1.What is the kinetic energy of a 394kg car moving at 15 m/s? 2.A truck has a kinetic energy of 150 000J and a mass of 95kg. What is the truck’s velocity?

3.What is the gravitational potential energy of a box with a weight of 645 000 N at a height of 36m?

4.A 16kg wagon moving at 23m/s. What is the kinetic energy?

5.If a 5kg cinder block was on a 65m ledge, would its gravitational potential energy be? 

6.If a 0.14 kg baseball has a kinetic energy of 58 000J, what would its velocity be?

7.If a 0.02 kg bullet is moving at 106m/s, what would be the kinetic energy?

8.What is a motorcycle’s velocity if it has a kinetic energy of 835 000 J and a mass of 76kg?

9.At what height would a 40kg person need to be to have 350 000J of gravitational potential energy?​

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i. e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i. e. include the distance traveled to the first encounter)

Each neuron shown in this figure innervates a group of muscle fibers. what is the term for a group of muscle fibers innervated by a single neuron?