A child pushes a toy car down a hill. After 5 seconds, the car has a kinetic energy of 115 J and a gravitational potential energy of 30 J. What is the car's mechanical energy at that time?

A) 3.9 J

B) 85 J

C) 115 J

D) 145 J

Select the major problems associated with the production of nuclear energy. air pollution hazardous solid wastes depletion of natural resources potential reactor accidents harm to animal and plant life Next Question

How do the gas giants differ from the inner planets of the solar system. Discuss composition, size, distance from the sun, length of a year and how much energy they get.

The si unit of measure for length the meter would be most appropriate when

In a machine, work output is less than work input because some energy is converted into thermal energy. true or false.

Convert rads/s to revs/s

A car rounds a 75-m radius curve at a constant speed of 18 m/s. a ball is suspended by a string from the ceiling the car and moves with the car. the angle between the string and the vertical is:

Emission of light from an atom occurs when an electron

Which is an example of transfroming potential energy to kinetic

Place the ball in the plastic bag, and twist the top so the ball is secure in the bag. Wrap the twisted portion with tape so it stays tight. Use the hole punch or scissors to poke a hole in the part of the bag that's above the ball.

Choose The units of 1/4πε0 are: A. N2C2 B. N • m/C C. N2 • m2/C2 D. N • m2/C2 E. m2/C2