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A pendulum of the length L is suspended from the ceiling of an elevator. When the elevator is at rest, the period of the pendulum is T. In instant when the pendulum reaches it's highest position the elevator starts the free fall. What is the period of the pendulum if the elevator is freely falling ?
a series combination of four identical resistors is across a battery. the potential difference across each resistor is
a 28Kg rock approaches the foot of a hill with a speed of 15 m/s.This hill slopes upward at a constant angle of 40degrees above the horizontal. use energy conservation to find the maximum height the rock will reach
A dockworker applies a constant horizontal force of 72.0N to a block of ice on a smooth horizontal floor, What is the mass of the block of ice
The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, a cheetah starts from rest, Determine the cheetah's average acceleration during the short sprint
An 90.0 kg skydiver jumps out of a balloon at an altitude of 1 180 m and opens the parachute at an altitude of 175m. find the speed of the diver when he lands on the ground
A particle is located at the vector position r = (7.00i+ 10.00j)m, Determine another position vector that lies on the y-axis
Your new sports car of mass m is accelerated from rest at t=0 with constant power P along a level road. ingore any resistance effects, find the speed of your car as a function of time
If 70% of a radioactive sample has decayed in 5.0 x 103 years, what is the decay constant of the material
A 10 kg block is sitting motionless next to a spring that has a spring constant of 500 N/m. How far is the spring compressed while you are still holding it
q1. a positively charged particle of mass 6.00 10-8 kg is travelling due east with a speed of 25 ms and enters a 0.46 t
A baseball pitcher can throw a fastball at a speed of ~150 km/hr. what is the largest size spherical asteriod of density p = 3 g cm^-3 from which he can throw the ball fast enough that it: a) escapes from the asteroid into heliocentric orbit?
A heat engine performs 192 J of work in each cycle and has anefficiency of 41%. For each cycle of operation, how much energy is absorbed byheat? Answer in units of J.
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