Multiple Choice

An object in motion will cause which of the following?

Select all that apply.

friction

decrease in heat flow

increase in heat flow

creation of energy

Describe how your range of motion compares to the range of motion of those in your group. Why might there be differences?

At 2.5 seconds, the helicopter has a kinetic energy of 20 J. What is its mechanical energy at that time?

A 5.0 kg rock is dropped from the top of a building. The speed of the rock after it has fallen for 2.2 seconds is?

What is - 37c on the Fahrenheit scale

What is a tool that can be used to measure the size of a force?

What basic form of energy is present in blowing wind?

A wave with a frequency of 30 Hz has a wavelength of 40.5 m. How fast is the wave traveling?

A soccer ball is sitting in the middle of a soccer field during a game. When the referee blows his whistle, one of the players runs toward the ball and kicks it as hard as he can.

A body with v=20m/s changes its speed to 28m/s in 2sec. its acceleration will be

Charge: A piece of plastic has a net charge of + 2.00 μC. How many more protons than electrons does this piece of plastic have? (e = 1.60 * 10-19 C)