What does a simple pulley do

Weight of a man is less at coal mine. Why?

Find the displacement if the velocity is 100 km to the east, time=3 h

Which property will eventually be the same for two objects after thermal energy is transferred btween them

Listed following are three possible models for the long-term expansion (and possible contraction) of the universe in the absence of dark energy: A) recollapsing universe B) coasting universe C) critical universe Rank each model from left to right

According to Newton's first law of motion, what is required to make an object slow down? Enter your answer in the space provided.

Describe and apply Newton's Three Laws

If you do 1000j of work on a system and remove 500j of heat from it, what is the change in its internal energy

Two children stretch a jump rope between them and send wave pulses back and forth on it. The rope is 4.5 m long, its mass is 0.42 kg, and the force exerted on it by the children is 71 N.

An object will only change its motion if a force is directly applied to it. is this a true statement?

Janice has just measured the density of an object. Which value is possible? (Density: D = )