S8P3 B

Katie sent a soccer ball toward Andy on a flat field. The ball started moving because of which force?

• her kick

• gravity

• friction

• air in the ball

Tags

NGSS.MS-PS2-2

Simon rolled a ball down a hill. The ball stopped before it reached the bottom of the hill. Which of these MOST LIKELY stopped the ball from rolling?

• mass

• gravity

• friction

• inertia

Tags

NGSS.MS-PS2-2

A box rests motionless on the ground. A student is pushing the box to the left with a force of 5 newtons. The force of friction opposes the student’s force with a magnitude of 2 newtons. In which direction and with what type of speed will the box move?

• It will move left at a constant speed.

• It will move left at an increasing speed.

• It will move right at a constant speed

• It will move right at an increasing speed.

Tags

NGSS.MS-PS2-2

Assuming the only two forces on a rocket are lift and gravity, which of the following combinations would result in the rocket moving upward?

• Lift = 5 newtons / gravity = 5 newtons

• Lift = 3 newtons / gravity = 4 newtons

• Lift = 5 newtons / gravity = 4 newtons

• Lift = 4 newtons / gravity = 4 newtons

Tags

NGSS.MS-PS2-2

A weightlifter holding a barbell above his head. The force of gravity pulling down on the barbell is 756 newtons (N). How many newtons of force are exerted by the weightlifter to hold the barbell up?

• 0N

• 756N

• 378N

• 1512N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A cart is being pushed over a smooth surface with a constant force. After five seconds, the cart starts moving over a rough surface. How will the cart be affected once the surface changes?

• The cart's inertia will increase.

• The cart's velocity will increase.

• The cart's friction will decrease.

• The cart's acceleration will decrease.

Tags

NGSS.MS-PS2-2