Force and Motion

Which type of force moves an object toward the source of the force?

• balanced

• friction

• pull

• push

Tags

NGSS.MS-PS2-4

When a ball is thrown 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.

Tags

NGSS.MS-PS2-4

Students are experimenting with a toy car on a smooth, wooden ramp. They apply force to the back of the car to push it down the ramp. The students measure how fast the car rolls down the ramp. If the students want to increase the speed of the car down the 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

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which picture best shows an animal overcoming the force of gravity?

• 
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• 
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Tags

NGSS.MS-PS2-4

Multiple forces, such as gravity and friction, act on a soccer ball when it rolls across a 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 and then backward

An object is hung from the ceiling as shown in the picture below. When a force is applied to the object, it moves. If a larger force is applied to the object, how will the motion of the object change?

• The object will move less distance with less speed.

• The object will move less distance with more speed.

• The object will move more distance with less speed.

• The object will move more distance with more speed.

Tags

NGSS.MS-PS2-2

Zach and Sydney are getting ready to play air hockey on a table like the one shown below. The arrows on the table pointing up represent air blowing upward through small holes in the table. Zach wonders what role the air plays in the game. Which statement best explains what role the air plays?

• 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.

A heavy suitcase is on the floor in a bus station. The following forces are acting on the suitcase:

A force of 2 newtons (N) pushing it to the right.

A force of 5 newtons (N) pushing it to the left.

The force of gravity pulling it down toward the floor.

The force of the floor pushing up on it. Which statement best identifies the result of all the forces acting on the suitcase?

• The suitcase moves to the left.

• The suitcase moves downward.

• The suitcase moves to the right.

• The suitcase does not move at all.

Tags

NGSS.MS-PS2-2

The picture below shows a group of people 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.

Tags

NGSS.MS-PS2-2

A car and a truck travel 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.

Tags

NGSS.MS-PS2-2