Mr. C physics review

When you know speed and direction you know

• force
• acceleration
• velocity
• momentum

What is the SI unit of speed?

• m/s
• m/s²
• kg
• miles/hour

In a speed vs. time graph, a straight line shows that acceleration is

• decreasing
• increasing
• constant
• zero

On a graph showing distance versus time, a horizontal line represents an object that is

• moving at constant speed
• decreasing its speed
• increasing its speed
• not moving

How can you increase the acceleration of an object if force is kept constant?

• decrease its mass
• increase its friction
• increase its mass
• decrease the force applied to it

You push a 10 kg cart and it accelerates at 2 m/s². What force did you push with?

• 2 Newtons
• 5 Newtons
• 10 Newtons
• 20 Newtons

If you exert a force of 20 N to push a desk 10 m, how much work did you do to the desk?

• 20 N
• 200 N
• 200 J
• 2 J

True/False: when two substances reach the same temperature they are in thermal equilibrium.

• True
• False

Temperature is a measure of the...

• total energy in a substance
• total kinetic energy in a substance
• average potential energy in a substance
• average kinetic energy of molecules in a substance

Specific heat capacity is related to the amount of heat...

• a specific object has
• one molecule contains
• transferred by one molecule
• needed to change the temperature of 1 gram of a substance by 1 degree