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

The radius of the path of an object in uniform circular motion is doubled the centripetal for needed if its speed remains the same is

two vehicles have a head on collision. one vehicle has a mass of 3000 kg and moves at 25 m/s while the second vehicle has a mass of 2500 kg and moves at - 15 m/s.

Identify at least one way that energy is involved in these situations

Jenna took an open bowl of leftover mashed potatoes from the refrigerator. She determined that chemical changes occurred since the potatoes were first placed there. Which observations most likely led to Jenna's conclusion? A. a production of odor B.

Two cars are moving in the same direction in parallel lanes along a highway. At some instant, the velocity of car A exceeds the velocity of car B. Does that mean that the acceleration of car A is greater than that of car B? Explain.

A generator converts

The standard international unit of measurement S I for mass is the what

What is the stopping distance at night for a passenger vehicle traveling at 50 mph?

How does mass affect weight

Communicable diseases can be prevented by: