A 750-newton person stands in an elevator that is

accelerating downward. The upward force of the

elevator floor on the person must be

(1) equal to 0 N (3) equal to 750 N

(2) less than 750 N (4) greater than 750 N

Why permanent magnets are made up of steels and core of soft iron is made up of soft iron?

Give an example in which velocity is zero yet acceleration is not.

A woman weighs 580 N. What's her mass?

What is the cost of operating a 3.00 W electric clock for an entire year if the cost of electricity is $0.0900 per kWh? (b) A large household air conditioner may consume 15.0 kW of power. What is the cost of operating this AC unit 3.

What did jesseca kusher make

Imagine that you replace the block in the video with a happy or sad ball identical to the one used as a pendulum, so that the sad ball strikes a sad ball and the happy ball strikes a happy ball.

Under what conditions will an object experience a gravitational force? Under what conditions will an object experience an electric force? Under what conditions will an object experience a magnetic force?

A basketball player pushes down with a force of 34 N on a basketball that is inflated to a gauge pressure of 9 x 104 Pa. What is the diameter of contact between the ball! and the floor?

Match these terms with their definitions: 1. unit of electrical resistance ampere 2. unit of electromotive force or electrical potential ohm 3. unit for measuring the strength of an electric current volt 4. unit of electrical power watt

In which is momentum conserved: an elastic collision or an inelastic collision?