Science Final

What is a change of velocity?

• Distance traveled by an object
• Acceleration of an object
• The speed of an object
• The rate of acceleration

how do you calculate momentum?

• Momentum = mass + velocity
• Momentum = mass - velocity
• Momentum = mass / velocity
• Momentum = mass x velocity

How do two objects of different masses have the same momentum?

• Momentum is not conserved in such cases
• Objects with different masses cannot have the same momentum
• Different masses with different velocities can result in the same momentum.
• Momentum is only determined by mass, not velocity

8. If someone is walking at a constant velocity in the same direction, what would be the acceleration? 

• 0 m/s^2
• 1 m/s^2
• 10 m/s^2
• 5 m/s^2

True/False: If forces are balanced, the net force on an object is zero.

• False
• True

8. How much force is required to lift a 10 N object off the floor?

• 10 N Upward

• 9N Upward 

•  Cannot be determined

• 11 N Upward

What is normal force?

• Normal force is the force exerted by a surface to support the weight of an object resting on it.
• Normal force is the force that causes an object to accelerate.
• Normal force is the force exerted by an object to push another object.
• Normal force is the force of gravity acting on an object.

8. Identify the false statement about action-reaction force pairs. 

• They always come in pairs.

• 1. They are always equal.

• They always act on one object.

•  They always occur at the same time.

Newton first law of inertia states

• An object at rest will accelerate indefinitely.
• An object in motion will stop immediately.
• An object at rest will move at a constant speed.
• An object at rest will remain at rest, and an object in motion will remain in motion unless acted upon by an external force.

what is the momentum of an object at rest?

• Negative
• One
• Zero
• Infinity