Forces and Motion Test

The diagram shows a car on a flat surface with two opposing forces and arrows indicating the direction in which the forces are applied.

What is the relationship between the forces if the car moves in the direction shown by the Force 2 arrow

• Force 2 is greater than Force 1.

• Force 1 is greater than Force 2.

• Force 2 is greater than zero but less than Force 1.

• Force 1 and Force 2 are both equal to zero.

A student pushed four toy cars labeled W, X, Y, and Z with various forces along a straight track. The table lists the mass and the distance traveled by each toy car in 60 seconds.

Which toy car was pushed with the greatest force?

• Toy Car W

• Toy Car X

• Toy Car Y

• Toy Car Z

Four students are asked to describe the forces acting on a ball when it is kicked across a field.

Which student’s description is correct?

• Student L

• Student M

• Student N

• Student O

A paper airplane is flying toward a fan at a constant speed.

If the fan is turned on, what is the best explanation of how the motion of the paper airplane will change?

• The paper airplane will fly faster toward the fan because of a balanced force.

• The paper airplane will fly faster toward the fan because of an unbalanced force.

• The paper airplane will fly slower toward the fan because of a balanced force.

• The paper airplane will fly slower toward the fan because of an unbalanced force.

A student rolls a basketball across the floor with different amounts of force. Which statement best describes the motion of the basketball?

• The basketball moves fastest when the largest balanced force is applied.

• The basketball moves fastest when the smallest balanced force is applied.

• The basketball moves fastest when the largest unbalanced force is applied.

• The basketball moves fastest when the smallest unbalanced force is applied.

Two unbalanced forces are acting simultaneously on an object at rest.

What will be the difference in force and direction experienced by the object?

• 5 N, to the left

• 5 N, to the right

• 19 N, to the left

• 19 N, to the right

A boy is playing with a tennis ball. He throws the ball on the ground, and the ball bounces as shown in the diagram.

After bouncing a number of times, the ball comes to rest on the ground. Which factor causes the ball to fall toward the ground after bouncing?

• pull of gravity

• size of the ball

• mass of the ball

• speed of the wind

A child throws a Frisbee to a dog for it to catch. Which statement best explains what must happen to the Frisbee before the dog can catch it?

• The mass of the Frisbee must increase.

• The force of gravity must pull the Frisbee toward the ground.

• The force of friction must decrease as the Frisbee travels in the air.

• The speed of the Frisbee must increase as it is thrown.

A girl guides a boat down a river, as shown.

A friend wants to get in the boat. Which statement best describes what will happen to the boat?

• The boat will move forward due to friction.

• The boat will sit higher in the water due to gravity.

• The boat will sit lower in the water due to gravity.

• The boat will move backward due to friction.

A kangaroo is well known for moving by hopping.

Why does the height of a kangaroo’s jump have no effect on whether the kangaroo lands back on the ground?

• The magnetic force between the kangaroo’s feet and the ground pulls the kangaroo down.

• The cyclic motion of Earth pulls the kangaroo down.

• The frictional force of the kangaroo’s feet on the ground pulls the kangaroo down.

• The gravitational force of Earth pulls the kangaroo down.