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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?
Why do optical astronomers put their telescopes on the tops of high mountains, while radio astronomers put their telescopes in deep valleys.
A space station shaped like a giant wheel has a radius of 105 m and a moment of inertia of 5.03 108 kgm2. A crew of 150 are living on the rim.
What is meant by the 'fine structure constant'? Explain what the fine structure constant tells us about the relative probability of the formation of a three par
Given that two bodies interact via some force, the accelerations of these two bodies have the same magnitude but opposite directions.
If electromagnetic wave equation for vacuum is
The speed of one marble is 2v and its mass is m; the speed of the other marble is v and its mass is 2m.
The centers of a 4.0-kg sphere and a 7.5-kg sphere are separated by a distance of 1.5 m. Where is the center of mass of the two-sphere system?
In the old west, a marshal riding on a train traveling 50m/s sees a duel between two men standing on the earth 50m apart parallel to the train.