Quiz 5 -ELCA Merit Physics

What is the essential element of an object that is in equilibrium?

• Zero acceleration

• Zero velocity

• Zero mass

• Zero energy

What is the main force acting on an object undergoing free fall?

• magetism

• the normal force

• gravity

• friction

An object falling to Earth in the absence of air resistance:

• slows down

• falls with a constant speed of 32 m/sec

• falls with a constant speed of 9.8 m/sec

A bowling ball has more inertia than a tennis ball.

• True

• False

Gravity is the tendency of an object to resist any change in motion.

• True

• False

Forces that are equal in amount and opposite in direction are balanced forces. This is illustrated by which of Newton's Laws?

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Newton's 0 Law

A deliveryman has to push a 100-kg refrigerator across the cafeteria floor. How much force must he push with to overcome the force of friction if the coefficient of friction between the floor and appliance is 0.65?

• 637 N

• 100 N

• 0.65 N

• 1,000,000 N

The Juniors and Seniors are having a Tug-of-War contest at the pep rally. The Juniors are pulling with a force of 15,437 N and the Seniors are pulling with 14,871 N of force. If the total mass of the Senior Team is 1,396 kg and the total mass of the Junior Team is 1,540 kg, who is being accelerated and by how much?

• The Seniors at 566 N.

• The Juniors at 1,540 N

JoJo and Bonnie need to push their car to the gas station. If the car has a mass of 1,000 kg and the coefficient of friction between the road and the tires is 0.60, what is the minimum amount of force that Bonnie and JoJo must apply to the car to get it moving?

• 9.8 N

• 5, 880 N

• 0.60 N

• 1,000 N

The Juniors and Seniors are having a Tug-of-War contest at the pep rally. The Juniors are pulling with a force of 15,437 N and the Seniors are pulling with 14,871 N of force. Who is going to lose this contest?

• The Seniors

• The Juniors

• The Faculty

• The Middle School