Checkpoint Review

What type of quantity is momentum?

• Value

• Unit

• Vector

• direct

What happens to momentum if you double the speed of a particle?

• It stays the same

• It gets doubled

• It gets halved

• It is tripled

What is the momentum of a 0.155 kg baseball thrown with a velocity of 30m/s toward home plate?

• 4.65 kg•m/s

• 6.45 kg•m/s

• 5.46 kg•m/s

• 4.56 kg•m/s

A 3 kg ball is accelerated from rest to a speed of 15 m/sec. What is the ball’s momentum?

• 54 kg•m/s

• 5.4 kg•m/s

• 45 kg•m/s

• 4.5 kg•m/s

A _____________ is any moving object that is only under the force of gravity.

• satellite

• projectile

• free floater

• vector

A carnival ride has a 3.0m radius and rotates once every 1.5s. What is the speed of the rider?

ac = 4π^2r ÷ T^2 V = √acr

• 13 m/s

• 5 m/s

• 11 m/s

• 9.4 m/s

the gravitational force between two masses is inversely proportional to the square of ____________.

• The distance between them

• the sum of the masses

• the product of the masses

• The strength of the gravitational field

What is the equation for Newton’s law of universal gravitation?

• G = F(m1m2/r^2)

• F = G(m1m2/r^2)

• T^3 = (4pi^2/Gms)r^2

• T = (4pi^2/Gms)r^3

You have a mass of 54 kg and Earth has a mass of 5.97 X 10^24 kg. The radius of Earth is 6.38 X 10^6 m. What is the force of gravitational attraction between you and Earth?

G = 6.67 X 10^‒11

• 6.60 X 10^2 N

• 5.28 X 10^2 N

• 9.80 N

• 4.40 X 10^2 N

Tags

NGSS.HS-PS2-4

Kepler's First law states that any orbiting body follows a(n) path.

• Circular

• eliptical

• focus

• rhomboid