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A sledge loaded with bricks has a total mass of 17.9 kg and is pulled at constant speed by a rope inclined at 19.8° above the horizontal. The sledge moves a distance of 19.6 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500.
(a) What is the tension in the rope?
(b) How much work is done by the rope on the sledge?
(c) What is the mechanical energy lost due to friction?
A 50-kg diver steps off a 10-meter high platform at the local pool. She comes to rest 3.0 meters below the surface of the water
A point charge q1=5microC and is fixed in place. From a horizontal distance of 6cm a small sphere of mass 0.004 kg and charge q2=2microC is fired towards the fixed charge at 40 m/s. What is the acceleration of the sphere when it is traveling 25 m/..
To develop muscle tone, a woman lifts a 4.50 kg mass held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0°. How much work does she do
What is the magnitude of the resultingforce (in nano-Newtons) on the 2 nC chargeat the origin? The Coulomb constant is
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Balls B and C are identical and have the mass of 0.50 kg. After the collision, balls B and C have the similar speed, 4.2 m/s, but ball B moves at an angle of 22 above the horizontal and ball C moves at an angle of 22 below the horizontal. What is ..
It takes 35J of energy to move a 0.35mC charge from one plate of a 35%u03BCF capacitor to the other. How much charge is on each plate
The lander is 8.2 meters above the surface and has the downward speed of 0.89 m/s while the engine is cut off. What is the speed of the lander just before it touches the surface.
An airplane must reach a speed of 186mi/h to take off. If the runway is 488m long, what is the minimum value of acceleration that will allow the airplane to take off successfully.
A merry-go-round is a common piece of playground equipment. A 3.0-m-diameter merry-go-round with a mass of 230kg is spinning at 17rpm, What is the merry-go-round's angular velocity, in rpm, after John jumps on
The coil of a galvanometer has a resistance of 18.6 ?, and its meter deflects full scale when a current of 6.48 mA passes through it. What is the maximum current that this ammeter can read
a disk with a rotational inertia of 5.00 kg m2 and the radius of 0.25 m rotates on a frictionless fixed axis perpendicular to the disk, the maximum angular acceleration of the disk is
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