Kinetic and Gravitational Potential Energy

An aeroplane with a mass of 40 000 kg is travelling at a speed of 648 km/h towards Singapore.

What is the kinetic energy of the aeroplane?

• 6.48 x 10⁸ J

• 8.40 x 10⁹ J

• 2.59 x 10¹³ J

• 3.36 x 10¹⁴ J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Each floor on the HDB is 3 metres high.

Bob climbs the staircase from the 6th floor to the 13th floor of a HDB block.

Bob has a weight of 500 N.

What is the increase in the gravitational potential energy of Bob as he reaches the 13th floor?

• 1 050 J

• 7 500 J

• 10 500 J

• 18 000 J

Tags

NGSS.HS-PS3-1

A car is speeding down the highway.

Which of the following will not affect its kinetic energy at a given time?

• acceleration of the car

• number of passengers

• weight of load in trunk

• velocity of the car

Tags

NGSS.HS-PS3-2

The diagram shows a roller-coaster ride.

At which point will the gravitational potential energy be at its highest?

• A

• B

• C

• D

The diagram shows a superhero saving a large egg from falling down the cliff.

A superhero caught the egg as it fell 50 m down the cliff.

He then brings the egg to safety, on top of a 200 metre high mountain.

The egg experiences an increase of 3 750 J of gravitational potential energy from the time it was saved to the point it was on the high mountain.

What is the mass of the egg?

• 1.5 kg

• 1.875 kg

• 15 kg

• 18.75 kg