Flash Cards: Forces, Kepler, Laws, work/Power, Momentum

Calculate the Net Force

Answer with the magnitude and direction

a measure of motion defined as the mass times velocity of an object.

• Momentum

• Impulse

• Elastic Collision

• Inelastic Collision

If the net force acting on the car is 37N to the

right, what is F?

• 13 N

• 0 N

• 50 N

• 87 N

In physics are Mass and Weight the same?

• Mass can change based on gravity.
• No, mass and weight are not the same.
• Weight is constant regardless of location.
• Mass is a measure of weight.

Calculate the direction and net force acting on

the bike.

• 11 N right

• 33 N right

• 0 N

• 13 N down

What is the main idea behind Kepler’s

second law?

• states that planets move in circular orbits at constant speed.

• describes the relationship between a planet's mass and its distance from the sun.

• a planet's orbital speed varies, sweeping out equal areas in equal times.

• The law explains that planets are attracted to the sun by a constant force.

Rearrange the force equation at the top of the page to find Mass.

F = ma

• m = F - a
• m = F + a
• m = F/a
• m = a/F

Pam is driving a car, and Dave is riding in the front passenger seat. Both are wearing seat belts. Pam crashes head-on into a concrete barrier, driving 50 kph. Assuming that Dave's mass is 1.5 times that of Pam, which statement below describes the force experienced by Dave?

• Dave experiences three times the force that Pam experiences.

• Dave experiences 1.5 times the force that Pam experiences.

• Dave experiences the same force as Pam experiences.

• Dave experiences half the force that Pam experiences.

In physics, power is identified as this

• force x distance
• distance / time
• work / time
• time / work

Bill is driving a very old car with a hood designed to be rigid in a crash. Linda is driving a new car with a hood designed to crumple in a crash. Both have the same mass and are wearing seat belts. In a head-on collision at the same speed with a wall, which driver will experience greater force?

• Both will experience the same force.

• Linda will experience the greater force.

• Bill will experience the greater force.

• This can't be determined from the information provided.