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"Speed of Earth when a rock of mass 60 kg falling towards Earth with speed of 20 m s-1 is" Multiple Choice Questions (MCQ) on momentum with choices 3.5 × 10-33 m s-1, 2.4 × 10-22 m s-1, −2.0 × 10-22 m s-1, and −3 × 1034 m s-1 for best ACT prep courses online. Practice explosions and crash landings quiz questions for jobs' assessment test and online courses for free online college courses.

MCQ: Speed of Earth when a rock of mass 60 kg falling towards Earth with speed of 20 m s-1 is

1. 2.4 × 10-22 m s-1
2. 3.5 × 10-33 m s-1
3. −2.0 × 10-22 m s-1
4. −3 × 1034 m s-1

C

MCQ: Force exerted by bat on ball if it strikes a ball of mass 0.16 kg initially hits bat with speed of 25 m s-1 with time impact of 0.003 s is

1. 145 N
2. 1333.33 N
3. 1456.7 N
4. 6543 N

B

MCQ: Momentum of electron having mass 9.1 × 10-31 kg and velocity 2.0 × 107 is

1. 1.91 × 10-23
2. 2.34 × 10-23
3. 3.11 × 10-19
4. 7.88 × 10-34

A

MCQ: To replace a ball with another ball by collision, a snooker player must consider the condition that

1. the collision must be head on
2. The moving ball must not be given any spin
3. both A and B
4. no conditions required

C

MCQ: Direction of momentum is direction of object's

1. mass
2. acceleration
3. velocity
4. frictional force

C