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Starting from rest, a 5.2-kg blockslides 2.40 m down a rough 30.0°incline. The coefficient of kinetic friction between the block and the incline is µk = 0.436.a) Determine the work done by the force of gravity.b) Determine the work done by the friction force between block and incline.c) Determine the work done by the normal force.d) Qualitatively, how would the answers change if a shorter rampat steeper angle were used to span the same vertical height?
Immediately before the collision, the linebacker is slipping with a velocity of 8.6 m/s north and the halfback is sliding with a velocity of 7.4 m/s east. Illustrate what is the magnitude of the velocity at which the two players move together imm..
A heat engine operating at maximum efficiency has an efficiency of 25%. The temperature of the cold reservoir is 300 K. What is the temperature of the hot reservoir
A cart of mass M = 1.2 kg can roll without friction on a level track. A light string draped over a light, frictionless pulley connects the cart to a hanger with mass m = 0.5 kg. The cart is released from rest, allowing it to roll, pulled by falling h..
A series DC circuit contains a 4mH inductor and an 80 ohm resistor in series with a 12V battery. What is the time constant for the circuit? What are the initial and final currents?
200 grams of iron at 100 degrees C. is dropped into aninsulated beaker containing 500 grams of water at 20 degrees C. What is the final temperature of iron and water
A car travels due east with a speed of 44.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. Find the velocity of the rain
A plane accelerates from rest at a constant rate of 5.00 along a runway that is 1800 long. What is the time needed to take off
A 3.00-kg block is connected to two ideal horizontal springs having force constants k1 = 28.0N/cm and k2= 19.0N/cm What is the maximum speed of the block
a mass m neutron has elastic collision with a mass m' stillnucleus. How much kinetic energy does the neutron lose
A pilot takes off from a city in Northern California and aims her airplane due North toward Seattle with a speed 240 km/h relative to the air. What is the magnitude of the airplane's velocity relative to the Earth
An object of mass m is moving at a velocity u. This object collides with another object of mass m, find the final velocity for both the classical and relativistic case
A ball rolls off a table and falls 0.81 m to the floor, landing with a speed of 5.5 m/s. What initial speed must the ball have if it is to land with a speed of 6.3 m/s
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