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While riding on an elevator descending with a constant speed of 2.4 m/s, you accidentally drop a book from under your arm
A space ship, at rest in a certain reference frame S, is given a speed increment of 0.46c (call this boost 1).
What is the magnitude of the change of her momentum between when she is at the top and bottom of the Ferris wheel.
Suppose the speed of light were 100 mph. Trains on parallel tracks are approaching each other at speeds of 92.64 mph and 87.89 mph
A spaceship moves away from Earth at a speed 0.874c and fires a shuttle craft that then moves in a forward direction at 0.21c relative to the ship.
A 9.72-g bullet is fired from a 30-30 rifle at a speed of 728 m/s into the 1.250 kg block of ballistic pendulum suspended by strings 3.9 m long.
A spaceship travels with a speed of 0.6 c as it passes by the Earth on its way to a distant star, as shown in the diagram below.
In a television picture tube, electrons strike the screen after being accelerated from rest through a potential difference of 25000 V.
The linear momentum of a runner in a 100-m dash is 7.5 * 10 kg * m/s. If the runner’s speed is 10m/s, what is his mass?
An observer at r = r1 in Schwarzchild geometry sends a light signal in the radial direction toward r = r2 where r2 > r1.
Tom's rocket ship is moving away from Kathy at 0.75c. He fires a laser beam in the backward direction, toward Kathy. According to Galilean relativity.
In classical physics, and in your everyday experience, lengths and times seem to be the same no matter who measures them.
If a disk rotating at 800 rpm couples to a stationary disk with three times the moment of inertia, what is the angular speed of the combination?
Each man runs with a speed of 3 ft/s measured relative to the cart. Determine the final speed of the cart if a.) A runs and jumps off, then B runs and jumps.
A man weighs 150lb and jumps onto a boat which is originally at rest. If he has a horizontal component of velocity of 3 ft/s just before he enters the boat.
Consider a ducted propeller system, which is moving forward at a velocity V1. Analyse the system by assuming the duct remains stationary.
A 0.025kg bullet traveling at 305m/s strikes a 1.500 kg ballistics pendulum hanging from a 2.00 m long string and buries itself in the block.
Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 24.0 kg and that of the boat is 50.0 kg.
Two billiard balls of equal mass move at right angles and meet at the origin of an xy coordinate system.
Imagine light as a particle reflected by a mirror purely elastically. Prove that incident angle is equal to the angle of reflection.
Two ice skaters, with masses of 50.0 kg and 75.0 kg, are at the center of a 40.0 m diameter circular rink.
Find the magnitude of the total initial momentum of the two-block system. Express your answer numerically.
What is the speed of the plank relative to the ice surface?What is her speed relative to the ice surface?
One of James bond's adversaries is standing on a frozen lake; there is no friction between his feet and the ice.
If the collision time is 0.080 s, what force does the seatbelt exert on the truck driver? What average force does the seatbelt exert on the car driver?