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A playground swing at its highest point during a child's play is 3.0 meters above the ground and 1.5 meter in front of the vertical plane which contains axis of rotation of the swing. Determine the torque exerted by gravity on a child on the swing when the swing is at the highest point of its motion. The mass of the child is 30 kilograms.
Two point charges and are held in place 4.50 apart. Another point charge -2.5 of mass 6 is initially located 3.00 from each of these charges and released from rest. You observe that the initial acceleration of -2.50 is 354 upward, parallel to the ..
what is its potential energy relative to the bottom of the shaft? how fast will the payload be traveling when it reaches the bottom of the shaft? convert your answer to mph for a comparison to highway speeds.
A projectile is launched from ground level with an initial speed of 52.2 m/s. Find the launch angle (the angle the initial velocity vector is above the horizontal) such that the maximum height of the projectile is equal to its horizontal range. (I..
A rock is tossed straight up with a velocity of 14 m/s When it returns, it falls into a hole 10m deep.
A car travelling at 120 strikes a tree. The front end of the car compresses and driver comes to rest after travelling 0.900.
After falling from rest from a height of 26 m, a 0.5 kg ball rebounds upward, reaching a height of 16 m. If the contact between ball and ground lasted 1.6 ms, Evaluate average force was exerted on the ball?
A 7 g bullet collides horizonally with a 43 g block resting on a frictionless horizontal surface as shown in the accompany diagram. The bullet remain embedded in the block and subsequently causes the block to slide down a frictionless slope onto a..
Solar energy is incident on the pond at an average rate of 400 . If the water absorbs all the solar energy and does not exchange energy with its surroundings, explain how many hours will it take to warm from 15 to 25 ?
What are the size and direction of the change in velocity if the initial velocity is 6 m/s south and the final velocity is 2 m/s west?
Draw a free body diagram for each situation and find the magnitude of the larger of the two individual forces in units of N. Find out the magnitude of the smaller of the individual forces in units of N.
What is the little distance between the speakers for which the interference of the sound waves is destructive.
A car rounds a 1.15 radius circular track at 82 Find the magnitude of the car's average acceleration after it has completed one-fourth of the circle.
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