momentum, force, speed, etc

1.      A person walking on a level surface moves forward because the forces of:

• The ground pushing backward on his feet

• The ground pushing forward on his feet

• His feet pushing forward on the ground

•      His feet pushing backward on the ground

Which statement correctly characterizes momentum as understood in the physical sciences?

• A.     An object with a large momentum has a large mass

• B.     Momentum is a measure of an object’s tendency to continue moving.

• c. the product of mass and velocity is large for an object with a large momentum

• D.     An object with a large momentum has a large velocity.

What is the metrics for momentum?

• Newton

• kg*m/s2

• kg*m/s^2

• A.     Newton*m

In Newton’s second law of motion, what is the relationship between acceleration and mass?

• Acceleration is divided by mass

•   Acceleration does not depend on mass

• Acceleration is inversely proportional to mass

• Acceleration is directly proportional to mass

The conservation of momentum is correctly expressed by which of the following statements? The Total momentum of interacting objects

• Usually remains the same

• Remains the same if there are no internal forces

• Always remains the same

• remains the same if there are no external forces

Which of the pair of variables defines motion?

• Speed and distance

• Time and momentum

   

• Speed and passage of time

• change of position and passage of time

Which fundamental properties are used to describe motion?

• Mass and distance

• Speed and time

• length and time

• Distance and speed

What is the difference between an object’s speed and velocity?

• There is no difference.

• Velocity includes time during which travel occurred

• Speed includes direction as well as the rate of travel

• Velocity includes the direction of travel whereas speed does not.

Which of the following statements are true of both weight and mass?

• Weight is a force, mass is a measure of inertia

• Gravity is necessary to measure both weight and mass

• Mass depends on gravity, weight does not

• Heavier objects weigh more than light objects

Which of the following best describes Newton's second law of motion?

• force equals mass divided by acceleration

• force equals mass times acceleration

• force equals mass minus acceleration

• force equals mass plus acceleration