Exam Review

Two electrons (charge 1.6*10^-19) are separated by a distance of 3.00 × 10^−6 meters. What is the electrostatic force?

• 1.60 × 10^2 N

• 2. 57× 10^−17 N

• 2.30 × 10^−28 N

• 7.66*10^-10 N

Two similar metal spheres, A and B, have charges of +2.0 × 10^–6 coulomb and +1.0

× 10^–6 coulomb.

The magnitude of the electrostatic force on A due to B is 2.4 newtons. What is the

magnitude of the electrostatic force on B due to A?

• 2.4N

• 0N

• 5N

• 10N

What force holds the particles in a nucleus together?

• Strong Force

• Weak Force

• Electromagnetic Force

• Gravitational Force

At which scale do strong interactions dominate?

• Atomic

• Subnuclear

• Cosmic

• Molecular

At a circus, a clown of mass 100. kilograms is fired horizontally at 15 meters per

second from a cannon of mass 500. kilograms. What is the recoil speed of the

cannon, to the nearest m/s? (use momentum before = momentum after)

• 5 kg*m/s

• 15 kg*m/s

• 0 kg*m/s

• 3 kg*m/s

A 4.0-kilogram mass is moving at 3.0 meters per second due east, and a 6.0-

kilogram mass is moving at 2.0 meters per second due west, on a horizontal,

frictionless table. If the two masses collide and remain together after the collision,

what is their final momentum, to the nearest newton-second?

• 0 N*s

• 10 N*s

• -12N*s

• 12 N*s

The greater the force exerted by the engine of a car over a set distance, the greater the change

in ―

• Kinetic Energy

• Potential Energy

• Elastic Energy

• Nuclear Energy

A 1.50-kilogram ball is thrown upward with an initial kinetic energy of 25 joules. Approximately

how high will the ball rise? (use KE=PE)

• 5m

• 1.67m

• 15m

• 20m

A ball with momentum must have ―

• Kinetic Energy

• Potential Energy

• Atomic Energy

• Subatomic Energy

Two factors that determine work are...

• Force

• Mass

• Velocity

• Distance