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A 10.3 kg block is dragged over a rough, horizontal surface by a 63.6 N force acting at 21° above the horizontal. The block is displaced 5.2 m, and the coefficient of kinetic friction is 0.189.
(a) Find the work done on the block by the 63.6 N force.
(b) Find the work done on the block by the normal force.
(c) Find the work done on the block by the gravitational force.
(d) What is the increase in internal energy of the block-surface system due to friction?
(e) Find the total change in the block's kinetic energy.
An initially uncharged air-filled capacitor is connected to a 4.01-V charging source, Find the capacitor's potential difference and charge after the insertion
What were the initial charges on the spheres? Since one is negative and you cannot tell which is positive or negative, there are two solutions.
A person can survive a feet-first impact at the speed of about 12 m/s (27 mi/h) on concrete; 15 m/s (34 mi/h) on soil; and 34 m/s (76 mi/h) on water. Why are there different values for different surfaces.
You're driving down the highway late one night at 18 when a deer steps onto the road 36 in front of you. The reaction time before stepping on the brakes is 0.50, and the maximum deceleration of your car is 12.
There is evidence that elephants communicate via infrasound, Determine the intensity level of the infrasound 10 km from the source, assuming the sound energy radiates uniformly in all directions
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed, Determine the magnitude of the electron's centripetal acceleration
What is the fundamental resonant frequency of the air column if the velocity of sound in the air is 340 m/s.
An ideal spring is lying horizontally on a frictionless surface, find the oscillation frequency of a 2.5 kg blcok under the same circumstances
define the potential difference between the plates.With what force must the player push the puck so that his force just equals the frictional force.
A person exerts a horizontal force of F = 169N in the test apparatus. (h = 0.32m.) Find the horizontal force M that his flexor muscle exerts on his fore arm.
What is weight of the parachutist
What are the size and direction of the change in velocity if the initial velocity is 6 m/s south and the final velocity is 2 m/s west?
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