Acceleration is rate of change of?

3 The manufacturer of a machine said that it is 86 percent efficient. If you use 70 joules to run the machine (input work), how much output work will it produce?

Two identical cars, one on the moon and one on earth, are rounding banked curves at the same speed with the same radius and the same angle. the acceleration due to gravity on the moon is 1/6 that of earth.

A 129-kg astronaut (including space suit) acquires a speed of 2.90 m/s by pushing off with her legs from a 1900-kg space capsule. use the reference frame in which the capsule is at rest before the push.

What feature may form in an intraplate area over a rising plume of hot mantle material?

A bus travel with an average velocity of 60km/h. How long does it take to cover a distance of 500km

Contrast the nucleus and electron in a cloud

For saving lives, what is the most important safely feature on a car a. air bag b. safely belt c. anti-lock brakes

An 1700 kg car is moving to the right at a constant speed of 1.50 m/s. (a) what is the net force on the car

Since there are no aurora observed on Venus we can conclude that Venus a. lacks atmospheric oxygen b. is too hot for magnetic forces. c. lacks a strong magnetic field. d. lacks strong winds.

A grocery shopper tosses a (n) 9.1 kg bag of rice into a stationary 19.3 kg grocery cart. The bag hits the cart with a horizontal speed of 6.6 m/s toward the front of the cart. What is the final speed of the cart and bag? Answer in units of m/s.