Which of newtons laws accounts for the following statement " Negative acceleration is proportional to applied braking force "

A box is pushed 40 m by amover. The amount of work done was 2,240 j. How much force was exerted on the box?

Positively charged particle A. proton B. neutron C. electron

Radiation with a wavelength of 238 nm shines on a metal surface and ejects electrons that have a maximum speedof 3.75 X 105 m/s. Which one of the followingmetal is it, the calues in paretheses being the work functions: a) potassium (2.

3-) A farm truck moves due east with a constant velocity of 9.50 m/s on a limitless, horizontal stretch of road. A boy riding on the back of the truck throws a can of soda upward (Fig. P4.

What are some inherited traits and learned behaviors of polar bears?

A car travels 35.0 mph north for 1.00 hour, then 40.0 mph east for 0.0500 hour, and finally 50.0 mph northeast for 2.00 hours. Calculate the average speed.

A 500 lb steel beam is lifted up by a crane to a height of 100 ft and is held there. A) How much work is being done to hold the beam in place? B) How much work was done to lift the beam?

If Light is shone through the slits of a card onto a sheet of white paper describe what is seen.

When you break a magnet in half, how many poles does each piece have? Explain.

What can you use to unscrew a tiny screw?