D is at rest at the top of a 2 m high slope. The sled has a mass of 45 kg. The sled's potential energy is J?

Driving while sleep impaired is much safer than driving while intoxicated.

How does a roller coaster create the sensations of falling, and being thrown around?

How does the total current through the branches of a parallel circuit compare with the current through the voltage source?

A source of sound is detected in the middle of a room. Which can account for a decrease in sound intensity for an observer?

A projectile travels above level ground. The initial vertical component of its velocity is 0.90 m/s and the initial horizontal component of its velocity is 0.60 m/s.

A bad case of the tonsillitis can sometimes affect a persons breathing how possible

How gravity affect time? With reference to einstein special theory of relativity

An experiment was performed on a 2-kg block. Forces of 5, 10 and 15 Newtons respectively were applied to the block for 5 seconds. Describe the difference in final speed between the three trials.

Jake designed an experiment to demonstrate a solar eclipse. The steps of the experiment are listed below. Place a light bulb on a stand. Stick a pencil into a small styrofoam ball. Switch on the light bulb and darken the room.

A boat sails an average speed of 20 km/h for 2 days. How far does the boat travel?