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A pulley of radius 20cm and moment of inertia is suspended from a ceiling and has a long string of negligible mass wound around it. A ball of mass 1kg is connected to the string and released from rest from a height of 2m above the floor. Calculate the acceleration of the ball (assuming that g=9.8m/s2).
The 20-cm-long wrench in the figure swings on its hook with a period of 0.80s, What is the moment of inertia about the hook
A catapult with a radial arm 4.19 m long accelerates a ball of mass 19.1 kg through a quarter circle. The ball leaves the apparatus at 41.6 m/s. Find the net torque exerted on the ball and arm
It is claimed that if a lead bullet goes fast enough, it can melt completely when it comes to a halt suddenly, Find the minimum speed of a lead bullet for such an event to happen
A 4.00 kg block is free from rest 2.0m high at the top of a 30 degree frictionless incline. The block makes a head-on elastic collision with another 3.00 kg block initially at rest on a horizontal surface at the bottom of the incline.
An ambulance leaves the police station in Big City and travels 4 blocks north then 5 blocks east to pick up a patient. How far is the police station from the hospital
A 6.4g lead bullet traveling at 460m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half is transmitted to the tree, what is the increase in te..
At an altitude of 260 m above the Earth's surface, the field is only 105 N/C. Calculate the charge density of the air (assumed constant).
A child sits 1.75 m from the center of a rotating merry-go-round that makes one complete revolution (spin) in 2.58 seconds. What is the child's acceleration
A playground is on the flat roof of a city school, 4.6 m above the street below (see figure). The vertical wall of the building is h = 6.10 m high, forming a 1.5-m-high railing around the playground. Find the vertical distance by which the ball cle..
Two equally charged particles, held 22.4 cm apart, are released from rest. The initial acceleration of the first particle is observed to be 4.0 m/s2 and that of the second particle is 6.0 m/s2. If the mass of the first particle is 3.40 x 10-7 kg, ..
A current of 48.6 mA exists in a wire for 1.20 minutes. What is the rate that charge passes a point in the wire
Assume you are a medieval knight attacking a castle with a cannon. The cannonball leaves the cannon with a speed of 40.7 m/s, What is the time of flight of the cannonball
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