An athlete stretches a spring an extra 28.6 cm beyond its initial length. how much energy has he transferred to the spring, if the spring constant is 52.9 n/cm?

Who has more momentum a person running or the same person walking? A) Walking B) Runing D) It depends on the mass D) All of the above

A car is traveling on the highway at 60 km/h. This is its A. speed B. velocity C. acceleration D. displacement

What is the momentum of a car with a mass of 9kg and a velocity of 2m/s? Do not write units in your answer. Round to the nearest whole number.

What is a rock that is full of tiny connected air spaces

what is the potential energy of the ball when it gets to its maximum height just before falling back to the ground

How does the brightness of a bulb tell you about the energy of electrons passing through it?

Why do you think sound travels faster in steel than it does in wood? (Hint: Think about the densities of the two materials, and how the particles might be arranged.)

On which body would a 100kg man have the least gravitational potential energy when lifted to a height of 3 meters

Which of the following factors can negatively affect development? a. Political corruption and instability b. Lack of resources c. Lack of education d. All of the above

A golf ball is hit with an initial velocity of 155 ft/s at an angle of 23 degrees with the horizontal. After 1.4 seconds, how far has the golf ball traveled horizontally and vertically?. a. 199.7 feet horizontally and 75.2 feet vertically. b. 60.