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A 15.0-kg block is dragged over a rough, horizontal surface by a 70.0-N force acting at 20.0° above the horizontal. The block is displaced 5.00 m, and the coefficient of kinetic friction is 0.300. Find the work done on the block by (a) the 70-N force, (b) the normal force, and (c) the gravitational force. (d) What is the increase in internal energy of the block-surface system owing to friction? (e) Find the total change in the block's kinetic energy
A railroad car of mass 2.6 104 kg moving at 5.00 m/s collides and couples with two coupled railroad cars, How much kinetic energy is lost in the collision
A lamp is suspended by a massless string from the ceiling of a descending elevator which decelerates at 1.7 m/s2. what is the mass of the lamp
a very long, straight solenoid witha cross-sectional area of 6.25cm^2 is would with 44 turns of wire per centimeter, What is the average inducted emf in the secondary coil
One arm of a U-shaped tube (open at both ends) contains water, and the other alcohol. at what height will the water be
given that the speed of sound in the air is 343 ms and that human ears are typically 20 cm apart what is the maximum
A massless rope connects two blocks through a frictionless pulley with a moment of inertia I = 0.4 kgm 2 and a radius R = 0.2 m. Find velocity of the second block just before it hits the ground
A block of mass 250 kg is pushed 2.20m along a frictionless horizontal table by a constant 16 Nforce directed 25.0 below the horizontal. estimate the work done by net force on block
a positive charge of q1 is located 7.00 m to the left of a negative charge -q2. the charges have different magnitudes.
The soccer goal is 21.78 m in front of a soccer player. She kicks the ball giving it a speed of 18.69 m/s at an angle of 25.43 degrees from the horizontal. find the speed of the ball just as it reaches the goalie
A wheel rolls 5 revolutions on a horizontal surface withoutslipping. If the center of the wheel moves 3.2 m, what is the radius of the wheel
A drinking straw 20 cm long and 3.0 mm in diameter stands vertically in a cup of juice 8.0 cm in diameter. What is the greatest height from which the child could drink
Find out the vertical component of the reaction force
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