OHS Physics 1st sem exam review

When comparing the momentum of two moving objects, which of the following is correct?

• The object with the higher velocity will have less momentum if the masses are equal. 
• The more  massive object will have less momentum if its velocity is greater.
• The less massive  object will have less momentum if the velocities are the same.
• The more massive  object will have  less momentum if  the velocities are the same.

If a force is exerted on an object, which statement is true?

• A large force always produces a large change  in the object's momentum.
• A large force produces a large change in the object's momentum only  if the force is applied over a very short time interval.
• A small force applied over a long term interval can produce a large change in the object's momentum.
• A small force produces a large change in the object's momentum.

The impulse experienced by a body is  equivalent to the body's change in 

• velocity
• kinetic energy
• momentum
• force 

A 75 kg person walking around a corner bumped into a 80 kg person who was running around the same corner. The momentum of the 80 kg person

• increased 
• decreased 
• remained the same 
• was conserved 

In a two-body collision 

• momentum is always conserved 
• kinetic energy is always conserved 
• neither momentum nor kinetic  energy is conserved 
• both momentum and kinetic energy are always conserved 

Two objects stick together and move with a common velocity after colliding. Identify the type of collision. 

• elastic
• perfectly elastic
• inelastic 
• perfectly inelastic 

Two billiard balls collide. Identify the type of collision. 

• elastic
• perfectly elastic 
• inelastic
• perfectly inelastic  

A billiard ball collides with a stationary identical billiard ball in an elastic head-on collision. After the collision, which of the following is true of the first ball? 

• It maintains its initial velocity.
• It has one-half its initial velocity.
• It comes to rest. 
• It moves in the opposite direction. 

Which of the following is an area of physics that studies motion and its causes?

• thermodynamics
• mechanics  
• quantum mechanics
• optics

Which of the following is an area of physics that studies motion and its causes?

• thermodynamics
• mechanics  
• quantum mechanics
• optics