Newton's Laws of Motion

A satellite is in orbit around the earth. Which one feels the greater force?

• the satellite because the earth is so much more massive

• the earth because the satellite has so little mass

• Earth and the satellite feel exactly the same force.

• It depends on the distance of the satellite from Earth.

A box is placed on a table which rests on the floor. The box pushes on the table; the reaction force to the box's push on the table is the table's push on the floor.

• True

• False

You are in a train traveling on a horizontal track and notice that a piece of luggage starts to slide directly toward the front of the train. From this observation, you can conclude that this train is

• speeding up.

• slowing down.

• changing direction.

• speeding up and changing direction.

• slowing down and changing direction.

You push on box G that is next to box H, causing both boxes to slide along the floor, as shown in the figure. The reaction force to your push is

• the push of box G on box H.

• the push of box H on box G.

• the push of box G against you.

• the upward force of the floor n box G.

• the acceleration of box G.

A truck is using a hook to tow a car whose mass is one quarter that of the truck. If the force exerted by the truck on the car is 6000 N, then the force exerted by the car on the truck is

• 1500 N.

• 24000 N.

• 6000 N.

• 12000 N.

A person is using a rope to lower a 5.0-N bucket into a well with a constant speed of 2.0 m/s. What is the magnitude of the force exerted by the rope on the bucket?

• 0.00 N

• 2.0 N

• 5.0 N

• 10 N

The acceleration due to gravity is lower on the Moon than on Earth. Which one of the following statements is true about the mass and weight of an astronaut on the Moon's surface, compared to Earth?

• Mass is less, weight is the same.

• Mass is the same, weight is less.

• Both mass and weight are less.

• Both mass and weight are the same.

Two blocks, A and B, are being pulled to the right along a horizontal surface by a horizontal 100-N pull, as shown in the figure. Both of them are moving together at a constant velocity of 2.0 m/s to the right, and both weigh the same.

Which of the figures below shows a correct free-body diagram of the horizontal forces acting on the upper block, A?

• 
• 
• 
• 
• 

Two blocks, A and B, are being pulled to the right along a horizontal surface by a horizontal 100-N pull, as shown in the figure. Both of them are moving together at a constant velocity of 2.0 m/s to the right, and both weigh the same.

Which of the figures below shows a correct free-body diagram of the horizontal forces acting on the lower block, B?

• 
• 
• 
• 
• None of these diagrams is correct.

What is the mass of an object that experiences a gravitational force of 700 N near Earth's surface where g = 10 m/s²?

• 0.7 kg

• 0.07 kg

• 70 kg

• 7000 kg