8th grade Aug-Dec

A baseball with a mass of 2 kg is accelerated with a force of 10 N. If resisting forces are ignored, what is the acceleration of the baseball to the nearest m/s2

Acceleration = force divided by mass

• 5 m/s2

• 2 m/s2

A toy car is traveling north at 3 m/s. The wind is blowing against it, south, at 1 m/s.

How will the car be affected if it enters a part of the road where the wind is moving south at

2 m/s?

• the toy car will move slower

• it will speed up

the sudden movement of tectonic plates is caused by

• unbalanced forces

• gravitational orbit

The total mass of the cyclist and the bicycle is 100.0 kg. Based on this information, what is the acceleration of the cyclist?

• 0 6. m6 /s2 forward, because the applied force is greater than the force of the air

• he will speed up

An unbalanced force causes:

• movement/motion

• nothing

F = MxA

how much force is acting on an object when you measure an acceleration of 2.6 m/s2 of an object with a mass of 5kg

• 13 N

• .8 N

• 15 N

Ben applies a force of 10 N to a toy car to slide it across the table to Avery.

If the force of friction resisting the Ben's push is 4 N, what is the net force acting on the toy car?

• 6 Newtons

• 2 Newtons

Why did this coin fall straight down to the cup according to Newtons laws?

• The coin was at rest until the card was removed, so it tended to remain in the same location. Once the card was gone, the unbalanced force of gravity caused the coin to fall.

• The coin was moving at the same speed as the card when it was removed, so it tended to remain in a different location.

A hot air balloon lifts up off the ground after a flame is created. What energy conversion is happening here?

• Chemical > Thermal > Mechanical

• Sound > Radiant >Electrostatic

At which location is the gravitational potential energy of the water the greatest?

• W

• x