Exam 3: Chemistry

If a track athlete were to double their running speed, they would also double their

• momentum

• potential energy

• both momentum and potential energy

Tags

NGSS.HS-PS2-2

A basketball rolling down a hill has more momentum than a person running down a hill

• True

• False

Tags

NGSS.HS-PS2-2

A simple machine cannot multiply

• force

• distance

• energy

• none of these, they can all be multiplied

Applying a force over a long period of time will lead to larger changes in momentum

• True

• False

Tags

NGSS.HS-PS2-1

An (a)   collision results in the transformation of energy from one object to the other without the coupling of objects.

You throw a basketball with a mass of 5.4 kg. The ball leaves your hand at 20 m/s. What is the kinetic energy of the ball?

• 1080 J

• 108 J

• 2160 J

• 148.15 J

Tags

NGSS.HS-PS3-1

You exert a force of 6.2 N on a large box to slide it across a table. If you do 2.3 J of work in the process, how far have you moved the book?

• 0.37 m

• 2.69 m

• 14.26 m

What is the momentum of a 3453 kg car moving at 12 m/s?

• 41,436 kg m/s

• 287.75 kg m/s

• 0.0035 kg m/s

• 41,634 kg m/s

Tags

NGSS.HS-PS2-2

A child pulls a sled up a hill. The child does 405 J of work on the sled. If the child walks 15 m up the hill, how large of a force must the child exert?

• 27 N

• 6075 N

• 0.037 N

Tags

NGSS.HS-PS2-1

A student who weighs 425 N climbed a five story building, 35 meters above in 60 seconds. What was their power?

• 247.92 W

• 4.94 W

• 728.6 W