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A well-thrown ball is caught in a well-padded mitt. If the deceleration of the ball is 2.10×104 m/s2, and 1.85 ms (1 ms=10?3 s) elapses from the time the ball first touches the mitt until it stops, what was the initial velocity of the ball?
a 26.5 kg boy slides down a steep slide at a water park that is 10.9 m long and angled 75 degrees above the ground. what is the magnitude of the boys acceleration as he travels down the slide
The electric field inside a 50.0?cm? long copper wire is 5.00mV/m .What is the potential difference between the ends of the wire
a negative charge of -0.550uC exerts an upward 0.205n force on an unknown charge 0.305m directly below it. what is the direction of the force that the unknown charge exerts on the -0.550uC charge
A 89.0 kg skydiver hanging from a parachute bounces up and down with a period of 1.50 s. What is the new period of oscillation when a second skydiver
A large block of copper initially at 20.0oC is placed in vat of hot water (80.0oC). For the first 1.0 J of heat that flows from the water into the block, find the entropy change of the block
A spaceship(Mo = 10,000 kg & Lo = 42m) is observed to be 42.2m long while traveling towards earth Determine the speed of the space ship. Determine the radio frequency emitted by the ship
A daredevil on the motorcycle leaves the end of a ramp with a speed of 36.0 m/s. If his speed is 34.20 m/s while he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance. In meters
in a science fiction movie a 100 g base ball travelling with a speed of 60m/s and an electron travelling at a speed of 1.2*10^8 m/s are approaching each other for a head on collision, what is the momentum of the base ball
A bird stands on a dc electric transmission line carrying 2800 A. find the potential difference between the bird's feet
The atomic bomb that was dropped on Nagasaki in 1945 killed 140,000 people, How much mass was converted to energy when this took place
A car is travelling at 26 m/s when the driver spots a large pothole in road a distance 34 m ahead. She at once applies her brakes. If her acceleration is -7.5 m/s2, does she manage to stop before reaching the pothole.
The proper length of one spaceship is three times that of another. The two spaceships are traveling in the same direction, determine the speed of the faster spaceship
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