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A zero-momentum spinner has a momentum wheel spinning at 5000 rpm. The angular momentum of the wheel is 100 N-m-s.
Two spaceships approach the Earth from opposite directions. According to an observer on the Earth, ship A is moving at a speed of 0.753c
The radar antenna on a navy ship rotates with an angular speed of 0.22 rad/s. What is the angular speed of the antenna as measured by an observer
A softball of mass 0.221 kg that is moving with a speed of 6.5 m/s (in the positive direction) collides head-on and elastically with another ball initially.
What is the angular momentum of the system relative to the center of mass?What is the angular speed about the center of mass after collision?
If a wire is placed next to the face of a permanent magnet and a current sent through the wire, then a Lorentz force is present orthogonal to both the direction
A ball (B) of mass m moves with velocity v relative to an observer (O). The momentum of B relative to O is p=mv according to Newtonian mechanics
A moving shuffleboard puck has a glancing collision with a stationary puck of the same mass. If the friction is negligible, what are the speeds of pucks.
Consider a Schwarzchild black hole of mass M=15Ms where Ms is the mass of the sun.
Give a very brief description of two observational tests of general relativity.
A stone is dropped at t = 0. A second stone, with 3 times the mass of the first, is dropped from the same point at t = 190 ms.
If the lower end of the chute is a vertical distance of 4.00 m above the bottom of the cart, what is the speed of the package just before it lands in the cart?
A 0.30 kg puck, initially at rest on a frictionless horizontal surface, is struck (inelastically) by a 0.20 kg puck that is initially moving along the x-axis.
Prove that the divergence of a tensor T^(ab) is given by
Laura, who’s mass is 35 kg, jumps horizontally off a 55 kg canoe at 1.5 m/s relative to the canoe. What is the canoe’s speed just after she jumps?
A set of quantities , whose inner product with an arbitrary vector (that is, a contravariant tensor of rank one) is a tensor
The big glider with an incident velocity of 2.6 m/s collides with the small glider that is initially at rest. The final velocity of the two gliders.
The following diagram shows two charged spheres arranged to the right of a point in space labelled P.
A particle of mass m and velocity Vo collides elastically with a particle of mass M initially at rest and is scattered through angle, A.
In preparation for shooting a ball in a pinball machine, a spring (k= 675 N/m) is compressed by 0.0650 m relative to its unstrained length.
A 12 kg block is released from rest on a 30 degree frictionless incline. Below is a block that can be compressed 2.0 cm by a force of 270 N.
Determine the kinetic and potential energies when the displacement is one half the amplitude.
A superball has collisions that are nearly perfectly elastic. A superball of mass M is dropped from rest from a height h (where h >> the size of the superball).
A spring of negligible mass is compressed between two masses on a frictionless table with upward sloping ramps at each end.
A 16-kg sled is being pulled along the horizontal snow-covered ground by a force of 24 N. Starting from rest, the sled attains a speed of 2.0 m/s in 8.0 m.