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A 16.8 kg block is dragged over a rough, horizontal surface by a constant force of 123 N acting at an angle of angle 34.9 above the horizontal. The block is displaced 17.4 m and the coefficient of kinetic friction is 0.205. Find the work done by the 123 N force. The acceleration of gravity is 9.8 m/s2 . Answer in units of J =1755.29
Find the magnitude of the work done by the force of friction. Answer in units of J=336.846
Find the work done by the normal force. Answer in units of J
What is the net work done on the block? Answer in units of J
Using the equation for the period of a pendulum, determine the period of a pendulum that is 3.0m long, Estimate the spring constant for each of the four springs on a 1260kg car if the static weight of the car causes the springs to compress 10.0cm
A football kicked off at an angle 20° from the ground reaches a maximum height of 4.7 m. What is the initial velocity of the kick.
Automobile engine slows down from 4500 rpm to 1200 rpm in 2.5 s. compute (a) its angular acceleration, assumed constant and (b) total number of revolutions the engine makes in this time.
Suppose a tank contains 770 m3 of neon (Ne) at an absolute pressure of 1.01×105 Pa. The temperature is changed from 293.2 to 295.6 K. What is the increase in the internal energy of the neon?
A hawk is flying horizontally at 17.0m/s in a straight line, 160 m above the ground. A mouse it has been carrying struggles free from its grasp. The hawk continues on its path at the same speed for 2.00s before attempting to retrieve its prey.
LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping it. What is the power of one laser pulse
A small glass bead has been charged to +30.0nC. What is the charge on the ball bearing
A bungee cord is stretched between two poles with a force of 390 N. What is the velocity of a wave on this bungee cord
Two 24 cm focal-length converging lenses are placed 16.50 cm apart. An object is placed 39.0 cm in front of one. Where would the final image formed by the second lens be located.
The Hall effect can be used to determine the density of mobile electrons in a conductor, Find the density of mobile electrons in the material
A certain atom of has 81 protons. Assume that the nucleus is a sphere with radius 6.99 fm, compute the magnitude of the electric field produced by the protons
A space traveler weighs 535 N on earth. What would the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth.
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