You exert of force of 75 newtons on a rock. You push and you push, but you can't budge it. You are exhausted! How much work did you perform?

What is the difference between delta and harbor?

An apple falls straight down from a tree. While the apple is falling: Group of answer choices the gravitational force does positive work on the apple, and the gravitational potential energy increases.

Current 1 of 8.4 a runs for 240 seconds and then stops. current 2 is 10.5 a. how long does current 2 have to run to deliver the same amount of charge as current 1? 88.2 s 192 s 2016 s 21,000 s

1. A 2500 kg car enters a curve with a radius of 45 m If the car is moving at a speed of 35 m's, what is the centripetal force that maintains the car's circular motion through the curve?

Which of the following has the least impact on the environment? A. solar power B. nuclear power C. fossil fuels D. hydroelectric power

How does a bicycle rider's energy of motion changes as the gain speed while riding down a hill? Options: A) It is lost. B) It increases. C) It remains the same. D) It is stored in the bicycle rider.

When is a sailboat the stand on vessel in relations to a recreational power boat?

What happens when a balloon is rubbed with a woollen cloth?

A child causes a wagon to accelerate by pulling it with a horizontal force. newton's third law says that the wagon exerts an equal and opposite force on the child. how can the wagon accelerate? (hint: draw a free-body diagram for each object.)

Which wavelengths of light is the highest in energy?