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A 6.0 kg sled is initially at rest on horizontal road. The coefficient of kinetic friction between the sled and the road is 0.40. The sled is pulled a distance of 3.0 m by a force of 37 N applied to the sled atan angle of 30° to the horizontal.
1. Find the work done by the applied force.
2. Find the energy dissipated by friction.
3. Find the change in the kinetic energy of the sled.
4. Find the speed of the sled after it has travelled 3 m.
A 42 kg pole vaulter running at 11 m/s vaults over the bar. Her speed while she is above the bar is 0.7 m/s. Avoid air resistance, as well as any energy absorbed by pole, and determine her altitude as she crosses the bar.
A roller coaster seat exerts a normal force of 120N on a 40kg passenger at the apex of a vertical loop. what is the speed of the coaster
An electron is moved from point A to point B in a uniform electric field and gains 5.28×10-15 J of electrostatic potential energy. Calculate the magnitude of the electrostatic potential difference between the two points.
A researcher would like to perform an experiment in a zero magnetic field, which means that the field of the earth must be cancelled. What current is needed in the solenoid's wires
The Gravitron is an amusement park ride in which riders stand against the inner wall of a large spinning steel cylinder. What is the maximum rotational speed at which the riders will not slide up the walls of the ride
A high diver of mass 65.0 kg steps off a board 10.0 m above the water and falls vertical to the water, starting from rest. what average upward force did the water exert on her
A meter stick is supported on a fulcrum at the 35 cm mark. A 0.70 kg object is hung from the zero end of the meter stick, What is the mass of the meter stick
A 3.50 kg block on a smooth tabletop is attached by a string to ahanging block of mass 2.8 k. The blocks are released from rest and allowed to move freely. (a) Find the acceleration of the blocks, and (b) find the tension in the string.
An organ pipe is shown to resonate at 240 Hz, 320 Hz, and 400 Hz. It does not resonate at any other frequencies between 240 Hz and 400 Hz, How long is the organ pipe
A large research balloon containing of helium gas at 1.00 and a temperature of 15.0 rises rapidly from ground level to an altitude at which the atmospheric pressure is only 0.900, What is the change in internal energy of the helium
astronauts use a centrifuge to simulate the acceleration of a rocket launch. the centrifuge takes 40.0 s to speed up
question a 2.88 mol sample of an ideal gas expands reversibly and isothermally at 286 k until its volume is doubled.
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