Just as a skydiver steps out of the helicopter, someone who's watching starts a stopwatch. so the time is zero as the skydiver steps out of the plane. what is the skydivers downward velocity at that instant, just before starting to fall

A bulldozer does 4,500 J of work to push a mound of soil to the top of a ramp that is 15 m high. The ramp is at an angle of 35° to the ground. How much force did the bulldozer apply to the mound of soil? Round your answer to two significant figures.

What is the definition of electrical discharge

This gas is found in small quantities in the lower layers of the stratosphere this gas is extremely important because it absorbs ultraviolet radiation A. Argon B. Carbon dioxide C. Nitrogen D. Ozone

Two billiard balls with the same mass m move in the direction of one another. Ball one travels in the positive x-direction with a speed of V1i, and ball two travels in the negative x-direction with a speed of V2i.

What data are needed to calculate the actual mechanical advantage of a machine? efficiency and force of friction input distance and output distance work input and work output input force and output force

A car is traveling at vx = 20 m/s. The driver applies the brakes and the car decelerates at ax = - 4.0 m/s2. What is the stopping distance? A car is traveling at = 20. The driver applies the brakes and the car decelerates at = - 4.0.

Most earthquakes occur along or near the edges of the earth's

What can we say about the rock as it falls to Earth? A) It accelerates as it falls. B) It falls at a constant rate of speed. C) It is at a constant velocity as it falls. D) It accelerates until it reaches a peak velocity, then decelerates.

What is true about the nodes and antinodes of a standing wave?

A large truck loaded with scrap Stella weights 14 metric tons and is traveling north on the interstate heading for Chicago. It has been averaging 48km/h for the journey and has traveled over the 1450 km so far. It has just stopped to refuel.