A block and tackle pulley system, such as the one below, multiplies the effort force that is put into the system. By how much would the block and tackle system below mulitply the effort force?

A particle is moving in a circle of radius R with constant speed. The time period of particle is T=1 second. In a time t=T/6, if the difference between average speed and magnitude of average velocity of particle is 2 m/sec, find the radius of circle

What type of power generation we should use in Ontario

Nancy immediately remembers she had promised to return her grandmother's call from earlier this morning. What type of memory is being proposed here?

A 0.023 kg golf ball moving at 15.7 m/s crashes through the window of a house in 5.3 * 10-4 s. After the crash, the ball continues in the same direction with a speed of 11.4 m/s.

Why are magnetic fields evidence of sea floor spreading

You are in the lab and are given two rods set up so that the top rod is directly above the bottom one. The two straight rods 50-cm long are separated by a distance of 1.5-mm each with 15 A of current passing through them.

What is the explanation for feather beds being warm

A student wearing frictionless in-line skates on a horizontal surface is pushed by a friend with a constant force of 47 N. How far must the student be pushed, starting from rest, so that her final kinetic energy is 354 J?

Suppose a rocket ship in deep space moves with constant acceleration equal to 9.8 m/s2, which gives the illusion of normal gravity during the flight.

A canoeist on a lake throws a 0.145 kg baseball at 20.0 m/s to a friend in a different canoe. Each canoe with its contents has a mass of 120 kg, and is at rest initially.