Work and energy class 9

Energy due to motion is ____________ energy.

• Potential

• Kinetic

• Friction

• None of the above

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

An arrow that is pulled back by a bow has which type of energy?

• Chemical potential

• Kinetic energy

• Gravitational potential

• Elastic potential

Gravitational potential energy depends on the ________ and ________ of the object.

• i. Height, mass and gravitational strength

• ii. Friction and movement

• iii. Mass and Movement

• iv. Height and Friction

Tags

NGSS.MS-PS3-2

Which is the best example that something has kinetic energy?

• a. a car parked on a steep hill

• b. a tennis ball rolling across the court

• c. a picture hanging on the wall

• d. a piece of coal before it's burned

Tags

NGSS.MS-PS3-1

A 0.40 kilogram bird is flying at a constant speed of 8.0 m/s. What is the bird's kinetic energy?

• i. 3.2 J

• ii. 4.2 J

• iii. 2.0 J

• iv. 12.8 J

Tags

NGSS.MS-PS3-1

A 60 kg person walks from the ground to the roof of a 80 m tall building. How much increase in gravitational potential energy is there? (Take g = 10 N/kg)

• 600 N

• 4800 J

• 8000 J

• 48,000 J