Acceleration, Energy, and Force

A 1,100 kg car comes uniformly to a stop. If the vehicle is accelerating at -1.2 m/s², which force is closest to the net force acting on the vehicle?

• -9,600 N

• -1,300 N

• -900 N

• -94 N

Tags

NGSS.MS-PS2-2

A fan is turned off in the living room. The fan slows down and comes to a rest as the forces become _______

• Frictional
• Balanced
• Unbalanced 
• Restricted

Tags

NGSS.MS-PS2-2

Looking at the roller coaster, were does the cart have the most potential energy?

• A
• B
• C
• D

Tags

NGSS.MS-PS3-2

When a car suddenly stops at a red light, a pizza lying in the passengers seat flies in to the windshield. Why does the pizza fly forward?

• The pizza loses its backward force
• The pizza's inertia causes it to continue moving. 
• The friction of braking transfers energy to the pizza. 

Tags

NGSS.HS-PS2-1

How much force is needed to accelerate a 5 kg marble at a rate of 2.5 m/s?

• 12.5
• 10
• 2
• 12

Tags

NGSS.MS-PS2-2

Which is an example of potential energy?

• A girl on a diving board
• A boy swimming
• A girl hitting a volleyball
• A boy running around the pool

Tags

NGSS.MS-PS3-2

Two trucks with different masses travel at the same speed down a hill toward a red light. What will happen when both trucks apply their brakes at the same time?

• The truck with the smaller mass will require less force to stop than the car with the larger mass.
• The truck with the small mass will take longer to stop than the car with the larger mass. 

Tags

NGSS.MS-PS2-2

Thomas is at rest standing on his skateboard and he throws a football. Since Thomas and the skateboard have a greater mass then the football, Thomas and the skateboard will-----

• Have the same forward force as the football
• Travel the same distance
• Move backward at a faster speed than the speed that the football moves forward
• Move backward at a slower speed than the speed that the football moves forward

Tags

NGSS.MS-PS2-1

What is the value of g on Earth?

• 9.81 m/s^2
• 9.81 N
• 9.81 m
• 9.81 s/m^2

All objects in the universe have a gravitational attraction to each other. 

• True
• False

Tags

NGSS.MS-PS2-4