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A running back with a mass of 92 kg and a velocity of 9 m/s (toward the right) collides with, and is held by, a 138-kg defensive tackle going in the opposite direction (toward the left). What is the velocity of the tackle before the collision for their velocity afterward to be zero? (Remember, velocity is a vector)
A spaceship is measured to be 120 m long while it is at rest with respect to an observer. If the spaceship now flies past the observer with a speed of .99c, what length would the observer measure of the spaceship.
A 4-kg rock is tied to the end of a string and twirled overhead, 1.7 m above the ground, in a 1.1-m radius, horizontal circle. How far away from its location when the string breaks will the rock hit the ground
A 1200 safe is 1.9 above a heavy duty spring when the rope holding the safe breaks. The safe hits the spring and compresses it 54 cm. What is the spring constant of the spring
A car of 1200 kg travels east at 24 m/s while a truck of 2200 kg travels north at 19 m/s They collide and stick together. a) What is the momentum in the system? b) What is the final velocity (magnitude and direction) after the collision?
Two children, Mary and Kate, are riding on a merry-go-round. Mary is at a greater distance from the axis of rotation than Kate. Which child has the larger angular speed? Tangential speed? Centripetal acceleration?
A charge of density p is distributed uniformly along an arc representing a half of a cirle of radius r. Determine the electric field intensity vector at an arbitrary point
A 6-in. nominal diameter (OD = 6.625 in.) pipe carrying vaporized heat transfer fluid at 750°F is covered with a 1.5-in. layer of high temperature insulation.
A conical pendulum is formed by attaching a 0.90kg ball to a 1.0m -long string, What is the ball's angular velocity, in rpm
The position of a particle is given by the expression x = (3.00 m) cos(4.00?t + ?/4), where x is in meters and t is in seconds. Determine the frequency and period of the motion
The two charges in the figure below are separated by d = 1.50 cm. (Let q1 = -16.5 nC and q2 = 26.5 nC.) Find the electric potential at point A
Chip rolls a ball down an incline (without slipping) at the same time Emmanuel slides a frictionless block with the same mass down the incline
If the plank has a mass of 20.0 kg and its center of gravity is at the middle of the plank, what are the forces F1 and F2?
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