Chap 2 Laws of Motion

What is the attractive force that exists between all objects that have mass called?

• weight

• gravity

• contact force

• mass

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If the distance separating the objects is the same for each pair, which pair of objects will have the greatest gravitational force between them?

• a 50-kg object and an 80-kg object

• a 65-kg object and a 65-kg object

• a 65-kg object and a 75-kg object

• a 60-kg object and a 70-kg object

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In a tug of war, the team on the left pulls with a force of 430 N and the team on the right pulls with a force of 420 N. What is the net force on the rope?

• 10 N to the right

• 10 N to the left

• 420 N to the right

• 430 N to the left

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Why is Newton's first law sometimes called the law of inertia?

• because inertia is the tendency of objects to resist changes to their motion

• because inertia describes the application of force to an object at res

• because inertia describes the application of force to an object in motion

• because inertia is the same thing as friction

How do the terminal velocity of two objects compare if they both have the same mass but one has a larger surface area?

• they both have the same terminal velocity

• it depends on the height from which the objects fall

• the object with the greater surface area will have a greater terminal velocity

• the object with the smaller surface area will have a greater terminal velocity

What features determine an object's acceleration?

• the forces acting on it and its size

• the forces acting on it and its mass

• the forces acting on it only

• its weight and its mass

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If three people pushing on a car each apply a force of 100 N, how much force does the car exert on each person?

• 33 N

• 100 N

• 300 N

• it depends on the mass of each person

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How is momentum different from inertia?

• Momentum is a property of both moving and stationary objects, while inertia is a property of stationary objects only.

• Momentum is a property of both moving and stationary objects, while inertia is a property of moving objects only.

• Momentum is a property of moving objects, while inertia is a property of stationary objects only.

• Momentum is a property of moving objects, while inertia is a property of both moving and stationary objects.

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Gravity and magnetism are examples of what?

• friction

• electrical forces

• contact forces

• non contact forces

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What happens to the gravitational force between two objects as they move farther apart?

• it increases

• it decreases

• it stays the same

• it fluctuates

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