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Q. A player uses a hockey stick to increase the speed of a 0.200kg hockey puck by 6m/s in 2 seconds. how much force was exerted on the puck? how much on the stick?
Q. You have a bottle containing a mole of a monatomic gas such as helium or neon. You warm up this monatomic gas with an electrical heater which inputs Q = 660 joules of thermal energy transfer. How much does the temperature of the gas increase?
Two charges, q1 and q2, are separated by a distance, r, and exert a force, F, on each other. What will the new force be if:
An electron is shot upward directly perpendicular to the lower plate of a parallel plate capacitor. Its initial velocity is 3.0 x 104 m/s. What must be the potential of the upper plate if the electron stops just before reaching it? The lower plate..
A 426 kg bear grasping a vertical tree slides down at constant velocity. The acceleration of gravity is 10m/s2. What is the friction force that acts on the bear? Answer in units of N.
You're driving down the highway late one night at 20 m/s while a deer steps onto the road 44m in front of you. Your reaction time before stepping on the brakes is 0.50 s, and the maximum deceleration of your car is 11m/s^2 .How much distance is be..
A 38.0 kg child swings in a swing supported by two chains, each 3.04m long. The tension in each chain at the lowest point is 429N. Find out the child's speeds at the lowest point.
A 28.0 {rm kg} child plays on a swing having support ropes that are 2.20 {rm m} long. A friend pulls her back until the ropes are 45.0^circ from the vertical and releases her from rest.
What is the change in length of the rope whilst the skier has the acceleration whose magnitude is 0.65 m/s2.
A bug is splattered on a car windshield. Evaluate the magnitude of the windshield's force on the bug to the magnitude of the bug's force on the windshield.
What is constant speed V
The wind blows with a force of 425N north on a sail boat, while the water exerts a force of 325N west on the sailboat. Find out the magnitude and direction of the net external force on the sailboat.
To test the deflection of the uniform 200-lb beam the 121-lb boy exerts a pull of 36 lb on the rope rigged. Calculate the force supported by the pin at the hinge O.
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.
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