PSc Review Day 6

The diagram shows three horizontal forces acting on an object. Neglecting friction, what is the magnitude of force, F, if the object remains at rest?

• 8N
• 14N

• 140 N

• 22 N

This graph represents the velocity of an object over time. What is the average acceleration of the object during the first 4 seconds?

• 1 m/s/s

• 2 m/s/s

• 4 m/s/s

• 8 m/s/s

This graph represents the motion of a cart. What is the average speed of the cart?

• 0.83 m/s

• 1.17 m/s

• 5 m/s

• 65 m/s

A car is traveling at a constant speed of 12 m/s. When the driver accelerates, the car reaches a speed of 26 m/s in 6 s. What is the average acceleration of the car?

• 2 m/s/s

• 15 m/s/s

• 10 m/s/s

• 5 m/s/s

A large rock has a mass of 750 kg. What is its weight?

• 7357.5 N
• 7450 N
• 7600 N
• 7200 N

A 100-kg student kicks a 1.5-kg ball with a force of 450 N. What force does the ball apply on the student?

• 300 N
• 225 N
• 500 N
• 450 N

The graph shows the motion of a car. What distance has the car traveled in 10 s?

• 0 m

• 50 m

• 10 m

• 16 m

The diagram represents a balloon that is moving in one direction while escaping air is moving in the opposite direction. What causes the balloon to move?

• action-reaction forces

• electrical forces

• friction

• gravitational potential energy

A student applies a force to a box with a mass of 30 kg. If the student applies the same force to a box with a mass of 15 kg, which best describes the effect on the acceleration of the 15-kg box?

• It is half the acceleration of the 30-kg box.

• It is double the acceleration of the 30-kg box.

• It is the same as the acceleration of the 30-kg box.

• It is triple the acceleration of the 30-kg box.