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An iron bolt of mass 79.0 g hangs from a string 32.4 cm long. The top end of the string is fixed. Without touching it, a magnet attracts the bolt so that it remains stationary, but is displaced horizontally 26.0 cm to the right from the previously vertical line of the string.
(a) Find the tension in the string.
(b) Find the magnetic force on the bolt.
A 20 kg child is on the swing that hangs from a rope 3.5 m long. What is her speed at the bottom of her arc if she swings to out 90 degrees.
The ball strikes the floor at a speed of 7.8 m/s. Illustrate what was the initial speed of the ball? Assume that air resistance is negligible.
the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find out the acceleration of the sled and child.
A 1500 {rm kg} wrecking ball hangs from a 20 {rm m} long cable. The ball is pulled back until the cable makes the angle of 17.0^circ with vertical.
Examine whether it is reasonable to ignore the effects of gravity for each particle. Evaluate the paths travelled by electron and proton and explain the differences.
A small glass bead has been charged to +30.0nC. A metal ball bearing 1.30cm above the bead feels a 1.90×10?2N downward electric force. What is the charge on the ball bearing?
A 54.00 kg pole vaulter running at 10 m/s vaults over the bar. Her speed while she is above the bar is 1.0 m/s. Avoid air resistance, in addition to any energy absorbed by the pole, and determine her altitude as she crosses the bar.
Speed of an aircraft at takeoff when launched from a catapult on an aircraft carrier The catapult on an aircraft carrier can take an aircraft from 0 to 207 mph in 9 seconds, at which time the aircraft launches.
At rest, the car's horn sounds at a frequency of 455 Hz. The horn is sounded while the car is moving down the street. A bicyclist moving in the same direction with one-third the car's speed hears a frequency of 427 Hz. What is speed of the car.
Use Gauss law to compute amount of charge
They are 15.0 m above a fire-fighters safety net. When landing jumper stretches the net 1.0 m before coming to rest. A. what was the average acceleration experienced by the jumper when slowed to rest by the net? B. Is this acceleration positive or ne..
Consider three containers of the same volume that are thermally insulated (no heat is transferred) from each other, but are connected by thin pipes that allow gas to pass freely from one to another.
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