When Abigail throws a ball into the air, which force causes the ball to fall back to the Earth?

• Gravity pulls the ball back to the Earth.

• Friction pulls the ball back to the Earth.

• Magnetic force pushes the ball back to the Earth.

• Atmospheric pressure pushes the ball back to the Earth.

Avery and Kai are participating in a school science project. They want to increase the speed of their toy car down a ramp. What should they do?

• decrease the angle of the ramp

• decrease the height of the ramp

• increase the force applied to the car

• increase the friction between the car and the ramp

Rohan is playing with a toy car. He pulls the string attached to the car. Which type of force moves the toy car toward Rohan?

• balanced

• friction

• pull

• push

David is pushing a shopping cart at the grocery store. If he applies a larger force to the cart, how will the motion of the cart change?

• The cart will move less distance with less speed.

• The cart will move less distance with more speed.

• The cart will move more distance with less speed.

• The cart will move more distance with more speed.

Sophia is observing different animals and wants to know which one is best overcoming the force of gravity. Which picture best shows an animal overcoming the force of gravity?

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Benjamin and Avery are playing soccer in the park. Multiple forces, such as gravity and friction, act on the soccer ball when it rolls across the field. Which statement best describes how friction affects the motion of the soccer ball?

• Friction causes the ball to bounce.

• Friction causes the ball to increase in speed.

• Friction causes the ball to decrease in speed.

• Friction causes the ball to roll forward then backward.

Avery and Oliver are playing air hockey at the arcade. Which statement best explains what role the air plays in their game?

• Air reduces the mass of the puck, letting it travel farther.

• Air pulls the puck downward, keeping it from flying off the table.

• Air balances the forces on all sides of the puck, causing it to move faster.

• Air reduces friction between the puck and the table, allowing it to slide across the table easier.

Henry and Benjamin are driving a car and a truck respectively at the same speed on a road in the same direction as shown in the image below. Both vehicles slow down with the same stopping force. Which statement best explains why the truck needs more distance than the car to stop?

• The truck has more mass.

• The truck has larger wheels.

• The truck has a longer length.

• The truck has a larger engine.

Avery is waiting at a bus station with her suitcase. Which statement best identifies the result of all the forces acting on her suitcase?

• The suitcase moves to the left.

• The suitcase moves downward.

• The suitcase moves to the right.

• The suitcase does not move at all.

Ava, Charlotte, Isla, and one more friend are participating in a tug-of-war with a rope. Each individual person pulls the rope with a force of 10 newtons (N). Which statement describes what will most likely happen when all of the people pull on the rope at the same time?

• The forces are balanced, so neither side will move.

• The forces are unbalanced, the side with four people will move forward.

• The forces are unbalanced, the side with two people will move backward.

• The forces are unbalanced, the side with four people will move backward.