Potential and Kinetic Energy

A worker easily pushes a cart loaded with five books each with a mass of 200 g. The worker removes one book from the cart, adds a box with a mass of 250 g, and continues to push the cart with the same force.

Which statement is true about the motion of the cart after the addition of the box?

• It will increase.

• It will decrease.

• It will stop.

• It will stay the same.

Tags

NGSS.MS-PS2-2

A student tries to move a toy cart on various surfaces using the same force. On which surface will the toy cart experience the least friction?

• grassy lawn

• glass pane

• cement sidewalk

• carpeted floor

Paul rides his bike down a ramp and applies the brakes to slow down. What force acts between the wheels of the bike and the ramp that causes the bike to slow down?

• acceleration

• friction

• gravity

• mass

Tags

NGSS.MS-PS2-2

A worker in a warehouse places eight boxes on a cart and pushes the cart with a force. The worker then removes three boxes from the cart, places them on a shelf, and pushes the cart forward with the same force.

What statement describes the change in motion of the cart after removing three boxes?

• The cart stops.

• The cart moves faster.

• The cart moves slower.

• The cart moves at the same speed.

Tags

NGSS.MS-PS2-2

On which surface would a moving object experience the least  amount of friction?

• grass feild

• gravel driveway

• ice rink

• wood floor

A soccer ball is kicked on a grassy field. The ball slows down as it rolls on the field.

What causes the ball to slow down?

• The magnetic attraction of the grass on the ball causes the ball to slow down.

• The gravity of the grass on the ball causes the ball to slow down.

• The mass of the grass on the ball causes the ball to slow down.

• The friction of the grass on the ball causes the ball to slow down.

Tags

NGSS.MS-PS2-2

A car spins out of control due to icy road conditions. What causes the car to spin out of control?

• The ice increases friction between the tires and the road.

• The ice causes the tires to move slower.

• The ice freezes the surface of the tires.

• The ice reduces friction between the tires and road.

Two girls are pulling a rope in opposite directions as shown in the figure.

If the mass of girl A is 50 kg, and the mass of girl B is 60 kg, in which direction will the rope be pulled?

• towards girl A

• towards girl B

• in the upward direction

• in the downward direction

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Myla pushes a dresser filled with clothes. She removes the drawers from the dresser and continues pushing the dresser with the same force.

How will removing the drawers affect the motion of the dresser? 

• The dresser will move slower due to the decrease in mass.

• The dresser will move faster due to the decrease in mass.

• The dresser will move slower due to the increase in gravity.

• The dresser will move faster due to the increase in gravity.

Tags

NGSS.MS-PS2-2

A student tests the friction on different surfaces by rolling a toy car on each surface. Which surface will have the least friction, and how will it impact the motion of the toy car?

• Carpet; the toy car will move the least distance.

• Concrete; the toy car will move the least distance.

• Grass; the toy car will move the farthest distance.

• Ice; the toy car will move the farthest distance.

Tags

NGSS.MS-PS2-2