Learn more about our help with Assignments: Physics

IV. An iron wire 1.0 m long with a square cross-section 2.0 mm on a side is used

to support a 100 kg load. Find the change in length.

A curve in a road has a radius of 240 m. If the road surface is level and on a

rainy day the coefficient of static friction is 0.48, what is the maximum speed

at which the car can negotiate this curve?

Calculate the rest energy of a single proton. Use the equation E=mc² to solve the problem.

Suppose a spaceship is approaching the Earth at half the speed of light and shoots a canister at a speed of 0.750c.

a). At what velocity will an Earth-bound observer see the canister if it is shot directly towards the Earth?

b). If it shot directly away from earth?

Two tugboats pull a disabled supertanker. Each tugboat exerts a constant force of

1.75 x 106 N, one 16

°

°

north of west and the other 16°

°

south of west, as they pull

the tanker 800 meters toward the west. What is the total work they do on the

supertanker?