Unit 1 Test Part A Flashcards

Front

An earthquake knocks both a dictionary and a comic book from the top shelf of a bookshelf. The dictionary has a greater mass than the comic book. Both books are knocked off the shelf at the same time. What can be said about the gravitational potential energy of the two books?

Back

The dictionary had greater gravitational potential energy than the comic book because it had a greater mass.

Answer explanation

The gravitational potential energy (GPE) is given by the formula GPE = mass × gravity × height. Since the dictionary has a greater mass and both books fell from the same height, the dictionary had greater GPE.

Front

If an equal force acts on each of the following objects, which will have the greatest acceleration? Options: A bowling ball, a basketball, a golf ball, a baseball.

Back

A golf ball.

Answer explanation

Acceleration is inversely proportional to mass (F=ma). The golf ball has the least mass among the options, so with the same force applied, it will experience the greatest acceleration compared to the bowling ball, basketball, and baseball.

Front

Forces of 50 Newtons and 30 Newtons are applied to an object in opposite directions. Which direction will the object move?

Back

It will move to the right. (→)

Answer explanation

The object experiences a net force of 20 Newtons to the right (50N - 30N). Since the net force is in the right direction, the object will move to the right.

Front

What causes a basketball to slow down after being rolled down the court?

Back

Friction

Answer explanation

The basketball slows down due to friction between the ball and the court. Friction opposes the motion, causing the ball to lose speed over time.

Front

A car is traveling at 80 miles per hour and suddenly comes to a stop. As a result, the passenger in the car will

Back

move forward

Answer explanation

When the car stops suddenly, the passenger's body continues moving forward due to inertia. This is why the correct answer is that the passenger will move forward.

Front

This is an example of Newton's

Back

Third

Answer explanation

This is an example of Newton's Third Law, which states that for every action, there is an equal and opposite reaction. This principle explains the interaction of forces between objects.

Front

What happens to the gravitational potential energy of an object as it is raised higher above the ground?

Back

The gravitational potential energy increases as the object is raised higher.

Front

Two forces of 20 Newtons and 20 Newtons are applied to an object in the same direction. What is the net force acting on the object?

Back

The net force is 40 Newtons in the direction of the applied forces.

Front

Which of the following objects will experience the least friction when sliding on a smooth surface? Options: A wooden block, a metal block, a plastic block, a rubber block.

Back

A plastic block.