Physical Science - Laws of Motion Quiz

The inertia of an object is related to its:

• mass and speed.

• mass and force.

• mass only.

• speed only.

The term that means “all of the forces together on an object” is:

• normal force.

• net force.

• frictional force.

• weight.

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Newton’s first law of motion is also known as:

• the law of universal gravitation.

• the law of force pairs.

• the law of unbalanced forces.

• the law of inertia.

Which of the barbells in Figure 6-1A has the most inertia?

• The 10-kg barbell

• The 20-kg barbell

• The 30-kg barbell

• They all have the same inertia

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If each of the barbells in Figure 6-1A were pushed with a force of 100 newtons, which would be harder to move?

• The 10-kg barbell

• The 20-kg barbell

• The 30-kg barbell

• They would all move equally

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Changes in motion come from:

• unbalanced forces.

• balanced forces.

• mass.

• inertia.

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A 0.15-kilogram baseball and a 7.25-kilogram bowling ball are both rolling along at 3 m/s. Which object is easier to stop and why?

• The bowling ball because it has less inertia

• The baseball because it has more inertia

• The bowling ball because heavy objects are naturally prone to stop on their own

• The baseball because it has less inertia

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A ball with a mass of 1 kg is moving in a straight line at the same speed as a ball with a mass of 10 kg. Both balls are brought to rest in 4.0 seconds. What is true of the force required to stop the balls?

• It takes less force to stop the 1 kilogram ball because it has less inertia.

• It takes more force to stop the 1 kilogram ball because it has more inertia.

• It takes the same force to stop both balls because they are moving at the same speed.

• It takes less force to stop the 10 kilogram ball because it has less inertia.

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A tow truck pulls a 2,000-kg car with a net force of 4,000 N. What is the acceleration of the car?

• 0.5 m/s²

• 2 m/s²

• 200 m/s²

• 2,000 m/s²

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A cart is rolling down a special ramp where there is no friction at all. What will happen if the amount of mass on the cart is increased?

• The cart will accelerate less.

• The cart’s acceleration will not be affected.

• The cart will accelerate more.

• The cart will move at a constant velocity.

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