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A 120N force applied horizontally drags a 4kg load along a horizontal table at a uniform velocity of 3m/s (a) what is the coefficient of kinetic friction between the load and the table (b) if the applied force is suddenly removed,how much further does the load slide before coming to a stop
A camera is equipped with a lens with a focal length of 39 cm. When an object 2.6 m (260 cm) away is being photographed, what is the magnification?
A cliff is 22 meters high.You fell in the water 5 meters away from the hil.What is your initial horizontal velocity
The cliff is 22 meters high.You fell in the water 5 meters away from the hill.what is your initial velocity?
1Kg of real gas is heated from 18ºC to 93 ºC. Assuming Cv=1.466KJ/KgK. Then internal energy is ……
A racer accelerates from rest at a constant rate of 20 m/s2. ( 8 pts )a. How fast will the racer be going at the end of 6sec?b. How far the first racer traveled during this time ?
Three children are trying to balance on a seesaw, which consists of a fulcrum rock,
acting as a pivot at the center, and a very light board of 3.6 m long. Two playmates
are already on either end. Boy A has a mass of 50 kg and Girl B and Girl C have
masses of 35 kg and 25 kg respectively.
(a) The Girl C is now sits at a distance x from the fulcrum to balance the seesaw.
Calculate x.
(b) If the weight of the board is to be considered, would distance x increased,
decreased or remain the same as in part (a)?
A block is pulled across a rough, horizontal surface from point A to point B by a
force, P as shown in the figure. The magnitude of the force of friction acting on
the block between A and B is 1.2 N, and points A and B are 0.50 m apart. If the
kinetic energies of the block at A and B are 4.2 J and 5.8 J, respectively, how
much work is done on the block by the force P between A and B?
2. A 12.6 kg block is connected to a 28.0 kg of bucket full of steel ball by a
string through a frictionless pulley as in the figure below. When the block is in
motion, the kinetic friction force on the surface of the table is 8.96 N.
a. Draw a free-body diagram for both block and bucket.
b. Calculate the acceleration of both block and bucket. Give your
answer in two decimal places.
1. A loaded sled weighing 85 N rests on an inclined plane at an angle of 15 o to
the horizontal as in the figure below. The coefficient of static friction between
the sled and the inclined plane is 0.25. Calculate the minimum force, F
parallel to the inclined plane, that will prevent the sled from slipping down.
