Linear Momentum and Collisions

A neon atom (m = 20 u) makes a perfectly elastic collision with another atom. After the impact, the neon atom travels away at a 54.4° angle from its original direction and the unknown atom travels away at a 50.0° angle. What is the mass of the unknown atom?

Linear Momentum and Collisions

Two 35 kg masses have velocities (in m/s) of v1 = 16 i - 22 j and v2 = - 20 i + 20 j. Determine the velocity of the center of mass of the system. VCM = ?????? m/s i + ?????? m/s j

Linear Momentum and Collisions

Two people, one of mass 70 kg and the other of mass 60 kg, sit in a rowboat of mass 80 kg. With the boat initially at rest, the two people, who have been sitting at opposite ends of the boat, 3.0 m apart from each other, exchange seats. How far will the boat move?

Linear Momentum and Collisions

A 14 g bullet strikes and becomes embedded in a 1.40 kg block of wood placed on a horizontal surface just in front of the gun. If the coefficient of kinetic friction between the block and the surface is 0.25, and the impact drives the block a distance of 9.6 m before it comes to rest, what was the muzzle speed of the bullet?

Linear Momentum and Collisions

A meteor whose mass was about 10^8 kg struck the Earth (m = 6.0 X10^24 kg) with a speed of about 11 km/s and came to rest in the Earth. (a) What was the Earth's recoil speed? (b) What fraction of the meteor's kinetic energy was transformed to kinetic energy of the Earth? (c) By how much did the Earth's kinetic energy ch ...continues

Linear Momentum and Collisions

A 16 g rifle bullet traveling 150 m/s buries itself in a 4.0 kg pendulum hanging on a 3.3 m long string, which makes the pendulum swing upward in an arc. Determine the horizontal component of the pendulum's displacement.

Linear Momentum and Collisions

After a completely inelastic collision between two objects of equal mass, each having initial speed, v, the two move off with speed v/4.5. What was the angle between their initial directions?

Coulomb's Law

Two point charges have a total charge of 590 µC. When placed 1.30 m apart, the force each exerts on the other is 22.8 N and is repulsive. What is the charge on each? (Enter the same value twice if the charges are equal, otherwise enter the smallest charge first.)

Coulomb's Law

What is the electric field strength at a point in space where a proton (m = 1.67 X10^-27 kg) experiences an acceleration of 4 million "g's"?

Coulomb's Law

Estimate the electric field at a point 3.1 cm perpendicular to the midpoint of a 2.0 m long thin wire carrying a total charge of 5.65 µC.