McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Uncategorized topics .
Chapters
| 401. |
To replace a ball with another ball by collision, a snooker player must consider the condition that |
| A. | the collision must be head on |
| B. | The moving ball must not be given any spin |
| C. | both A and B |
| D. | no conditions required |
| Answer» C. both A and B | |
| 402. |
Direction of momentum is direction of object's |
| A. | mass |
| B. | acceleration |
| C. | velocity |
| D. | frictional force |
| Answer» C. velocity | |
| 403. |
In a springy collision, if the fast moving trolley collides with a slow one, then the fast one will bounce back at speed of |
| A. | slow one |
| B. | less than slow one |
| C. | more than slow one |
| D. | with the same speed as before |
| Answer» A. slow one | |
| 404. |
An object travelling with constant velocity has |
| A. | constant momentum |
| B. | zero momentum |
| C. | increasing momentum |
| D. | decreasing momentum |
| Answer» A. constant momentum | |
| 405. |
If a trolley collides with a stationary trolley of double mass, then they move off with |
| A. | half of the original velocity |
| B. | one third of original velocity |
| C. | double the original velocity |
| D. | triple the original velocity |
| Answer» B. one third of original velocity | |
| 406. |
In a perfectly elastic collision, momentum and energy are |
| A. | not conserved |
| B. | conserved |
| C. | becomes zero after collision |
| D. | equal before collision |
| Answer» B. conserved | |
| 407. |
Mass and velocity are combined to give |
| A. | angular momentum |
| B. | equilibrium |
| C. | acceleration |
| D. | linear momentum |
| Answer» D. linear momentum | |
| 408. |
If the total kinetic energy and momentum of a system becomes zero after collision, then the collision is |
| A. | elastic |
| B. | inelastic |
| C. | conserved |
| D. | not conserved |
| Answer» B. inelastic | |
| 409. |
Momentum of two objects moving with same speed but in opposite direction upon collision is |
| A. | increased |
| B. | decreased |
| C. | is zero |
| D. | is infinite |
| Answer» C. is zero | |
| 410. |
Forces on interacting bodies are |
| A. | equal |
| B. | opposite |
| C. | both A and B |
| D. | parallel |
| Answer» C. both A and B | |
| 411. |
Resultant force acting on object and rate of change of linear momentum are |
| A. | inversely related |
| B. | not related at all |
| C. | directly related |
| D. | directly proportional |
| Answer» C. directly related | |
| 412. |
In a perfectly elastic collision, the relative speed of approach and relative speed of separation are |
| A. | equal |
| B. | in equal |
| C. | zero |
| D. | infinite |
| Answer» A. equal | |
| 413. |
{{}} A white ball of mass 1.0 kg moving with initial speed u = 0.5 m s -1 collides with stationary red ball of same mass, they move forward making angle of 90° between their paths. Their speed is |
| A. | 1 m s -1 |
| B. | 0.354 m s -1 |
| C. | 2 m s -1 |
| D. | 3 m s -1 |
| Answer» B. 0.354 m s -1 | |
| 414. |
In fireworks the momentum provided by chemicals is directed |
| A. | upwards |
| B. | left side |
| C. | right side |
| D. | downwards |
| Answer» D. downwards | |
| 415. |
Total momentum within a closed system is |
| A. | increasing |
| B. | decreasing |
| C. | zero |
| D. | constant |
| Answer» D. constant | |
| 416. |
Average force acting on 900 kg car if it's velocity ranges from 5 m s -1 to 30 m s -1 in 12 s is {{}} |
| A. | 1875 N |
| B. | 2000 N |
| C. | 3000 N |
| D. | 1560 N |
| Answer» A. 1875 N | |
| 417. |
Interaction that causes an object's momentum to change is |
| A. | velocity |
| B. | acceleration |
| C. | power |
| D. | force |
| Answer» D. force | |
| 418. |
Momentum possessed by spinning objects is called |
| A. | linear momentum |
| B. | angular momentum |
| C. | normal momentum |
| D. | degrees' momentum |
| Answer» B. angular momentum | |
| 419. |
In a perfectly inelastic collision, kinetic energy |
| A. | totally disappears |
| B. | is increased |
| C. | is decreased |
| D. | is unchanged |
| Answer» A. totally disappears | |
| 420. |
Contact force always acts at |
| A. | acute angles to the surface producing it |
| B. | right angles to the surface producing it |
| C. | obtuse angle to the surface producing it |
| D. | parallel to the surface producing it |
| Answer» B. right angles to the surface producing it | |
| 421. |
Combinations of base units are |
| A. | simple units |
| B. | derived units |
| C. | scalars |
| D. | vectors |
| Answer» B. derived units | |
| 422. |
Two forces which make up Newton's third law can |
| A. | act on same objects |
| B. | act on different objects |
| C. | not act at same time |
| D. | not act oppositely |
| Answer» B. act on different objects | |
| 423. |
Rate of falling object in vacuum is |
| A. | independent of weight |
| B. | dependent on mass |
| C. | independent of mass |
| D. | dependent of weight |
| Answer» C. independent of mass | |
| 424. |
At terminal velocity the |
| A. | air resistance and weight are equal |
| B. | air resistance is less than weight |
| C. | weight is more than air resistance |
| D. | air resistance is more than weight |
| Answer» A. air resistance and weight are equal | |
| 425. |
Vehicle will accelerate as long as |
| A. | air resistance is greater than thrust |
| B. | air resistance is greater than inertia |
| C. | thrust is greater than air resistance and friction |
| D. | friction is greater than thrust |
| Answer» C. thrust is greater than air resistance and friction | |
| 426. |
1 N is equal to {{}} |
| A. | 1 kg m s-2 |
| B. | 10 kg m s-1 |
| C. | 10 kg m s-2 |
| D. | 100 kg m s-2 |
| Answer» A. 1 kg m s-2 | |
| 427. |
Density of air is |
| A. | 1⁄8 of water |
| B. | 1⁄7 of water |
| C. | 1⁄45 of water |
| D. | 1⁄800 of water |
| Answer» D. 1⁄800 of water | |
| 428. |
Until a force acts on a body, it's velocity is |
| A. | zero |
| B. | constant |
| C. | increasing |
| D. | decreasing |
| Answer» B. constant | |
| 429. |
If there is no net force acting on body, then its acceleration is |
| A. | zero |
| B. | constant |
| C. | increasing |
| D. | decreasing |
| Answer» A. zero | |
| 430. |
Acceleration of a rocket having mass 5000 kg and resultant force acting on it is 200,000 N is {{}} |
| A. | 50 m s-2 |
| B. | 56 m s-2 |
| C. | 70 m s-2 |
| D. | 40 m s-2 |
| Answer» D. 40 m s-2 | |
| 431. |
Force which makes it difficult to run through shallow water is called |
| A. | viscosity |
| B. | up thrust |
| C. | friction |
| D. | drag |
| Answer» D. drag | |
| 432. |
Prefix for 10-9is {{}} |
| A. | micro |
| B. | deci |
| C. | centi |
| D. | nano |
| Answer» D. nano | |
| 433. |
Acceleration due to gravity on moon is |
| A. | 9.9 m s-2 |
| B. | 9.5 m s-2 |
| C. | 6.1 m s-2 |
| D. | 1.6 m s-2 |
| Answer» D. 1.6 m s-2 | |
| 434. |
An object immersed in fluid experiences an upward force named |
| A. | viscosity |
| B. | drag force |
| C. | up thrust |
| D. | friction |
| Answer» C. up thrust | |
| 435. |
If each term in an equation has same base units then the equation is said to be |
| A. | homogeneous |
| B. | non homogeneous |
| C. | equation of straight line |
| D. | equation of circle |
| Answer» A. homogeneous | |
| 436. |
A force similar to friction is |
| A. | forward force |
| B. | pulling force |
| C. | drag force |
| D. | contact force |
| Answer» C. drag force | |
| 437. |
Forces acting on an object are balanced if resultant force on object is |
| A. | constant |
| B. | zero |
| C. | increasing |
| D. | decreasing |
| Answer» B. zero | |
| 438. |
Base unit among following is |
| A. | Newton |
| B. | Joule |
| C. | Candela |
| D. | Watt |
| Answer» C. Candela | |
| 439. |
Force provided by breaking system of train if it is decelerating at rate of -3 m s -2 and having mass 10,000 kg is {{}} |
| A. | -30,000 N |
| B. | -40,000 N |
| C. | -50,000 N |
| D. | 30,000 N |
| Answer» A. -30,000 N | |
| 440. |
Force applied on a body and its acceleration are |
| A. | inversely related |
| B. | directly related |
| C. | not related at all |
| D. | inversely proportional |
| Answer» B. directly related | |
| 441. |
The larger the mass of a moving object the |
| A. | larger the acceleration produced |
| B. | acceleration becomes constant |
| C. | smaller the acceleration |
| D. | acceleration becomes zero |
| Answer» C. smaller the acceleration | |
| 442. |
500 MW can be written in powers of 10 as {{}} |
| A. | 500 × 106 |
| B. | 500 × 103 |
| C. | 500 × 10-6 |
| D. | 500 × 109 |
| Answer» A. 500 × 106 | |
| 443. |
Point where entire weight of an object acts is |
| A. | edge |
| B. | center of gravity |
| C. | central point |
| D. | can be anywhere in body |
| Answer» B. center of gravity | |
| 444. |
Another name for force of gravity acting on an object is |
| A. | friction |
| B. | air resistance |
| C. | weight |
| D. | mass |
| Answer» C. weight | |
| 445. |
When two objects are in contact, they exert forces in |
| A. | opposite direction |
| B. | same directions |
| C. | can be both A and B |
| D. | perpendicular direction |
| Answer» A. opposite direction | |
| 446. |
Activity is proportional to number of |
| A. | daughter nuclei |
| B. | decayed nuclei |
| C. | undecayed nuclei |
| D. | father nuclei |
| Answer» C. undecayed nuclei | |
| 447. |
Energy given to nucleus to dismantle it increases the |
| A. | kinetic energy of individual nucleons |
| B. | mechanical energy of individual nucleons |
| C. | potential energy of individual nucleons |
| D. | chemical energy of individual nucleons |
| Answer» C. potential energy of individual nucleons | |
| 448. |
Radioactive decay is a |
| A. | random process |
| B. | non-spontaneous process |
| C. | regular process |
| D. | massive process |
| Answer» A. random process | |
| 449. |
1 u is equal to {{}} |
| A. | 1.660 × 10-27 kg |
| B. | 2 × 10-27 kg |
| C. | 3 × 10-27 kg |
| D. | 5 × 10-27 kg |
| Answer» A. 1.660 × 10-27 kg | |
| 450. |
In gamma emission, the change in nucleon number is |
| A. | zero |
| B. | definite |
| C. | increase by 1 |
| D. | decreases by 1 |
| Answer» A. zero | |
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