Unit 2 - Forces and Motion

What was the average speed of the helicopter during the trip?

• 2.0 km/min

• 2.5 km/min

• 4.0 km/min

• 7.5 km/min

Tags

NGSS.MS-PS3-1

Gravity is a measurable force of attraction which acts upon objects. Which characteristic determines the gravity of an object?

• friction

• mass

• tension

• weight

Tags

NGSS.MS-PS2-4

Rowing a boat forward requires a force that will overcome friction from water and wind. Which factor most helps overcome the forces working against the boat?

• the length of the boat

• the height of the sides of the boat

• the weight of the rowers in the boat

• the number of people rowing in the boat

Mountain bike tires have large, knob-like treads. These tires are useful on steep slopes because they

• increase friction

• carry heavy weight

• increase the stopping distance

• prevent braking of the bicycle

Tags

NGSS.MS-PS2-2

Which notes show that Carla's bicycle is in motion?

• 1,2, and 5

• 1,2, and 3

• 2,3, and 5

• 2,3, and 4

Tags

NGSS.MS-PS3-1

If Megan is looking only at the car next to her as it pulls forward, in which direction does her car appear to be moving?

• 
• 
• 
• 

Which is most likely needed when describing the change in position of an object?

• initial speed

• direction change

• reference point

• constant rate

.

• The crumbled sheet weighed more than the flat sheet

• The crumbled sheet weigghed less than the flat sheet

• More air resistance acted on the crumpled sheet than on the flat sheet

• Less air resistance acted on the crumpled sheet than on the flat sheet

A student pushes on an object with a force of 6 newtons and the object does not move. What force does the object exert on the student's hands?

• 0 N

• 3 N

• 6 N

• 12 N

Tags

NGSS.MS-PS2-1

A jet plane is moving at a constant velocity on a flat surface. Which forces act against the forward motion of the jet plane?

• gravity and engine thrust

• engine thrust and friction

• friction and air resistance

• projectile motion and gravity