Oquizy

An astronaut travels from Earth to the Moon. Which of the following statements correctly describes the change in the astronaut's mass and weight?

Both the astronaut's mass and weight decrease. Both the astronaut's mass and weight remain the same. The astronaut's mass decreases, but their weight remains the same. The astronaut's mass remains the same, but their weight decreases.

A train consists of an engine of mass 5000 kg pulling two cars of masses 2000 kg and 3000 kg in a straight line on a horizontal track. The train accelerates at 2 m/s². What is the tension in the coupling between the two cars behind the engine?

2000 N 4000 N 6000 N 8000 N

A lift of mass 500 kg is being accelerated upwards at 2.0 m/s² by a cable. What is the tension in the cable? (Take g = 10 N/kg).

4000 N 5000 N 6000 N 7000 N

What is meant by inertia?

The ability to gain speed quickly The acceleration due to gravity The force keeping objects at rest The property that resists changes in motion

Block A of mass 6 kg rests on a rough 30° incline and is connected over a smooth pulley at the top to a hanging block B of mass 5 kg. The coefficient of kinetic friction between block A and the plane is 0.10. Friction is calculated by multiplying the kinetic friction coefficient with the normal force. When released, the system moves with block B descending. Taking g = 10 m/s², what is the magnitude of the acceleration of the system?

0.9 m/s² 1.2 m/s² 1.35 m/s² 1.8 m/s²

An object of mass 5 kg is placed on Earth where g = 10 N/kg. What is its weight?

10 N 25 N 5 N 50 N

Quiz: Physics - Dynamics