Physics Review 1

What point on the roller coaster is showing the greatest kinetic energy?

• A

• B

• C

• D

What is the total mechanical energy of the 100 kg cart at point B, where it is 10m above the ground and is traveling at 12m/s?

• 7,200 J

• 10,000 J

• 17,200 J

• 2,800 J

What is the potential energy of the 100kg cart at point D where it is 12m above the ground?

• 1,200 J

• 11,760 J

• 600 J

• 112 J

What is the kinetic energy of the 100 kg cart at point C if it is traveling at 15m/s?

• 11,250 J

• 750 J

• 22,500 J

• 45,000 J

Which of the following statement is correct regarding the mechanical energy of the system?

• The roller coaster has more mechanical energy at point C than point B because it has more KE at point C.

• The roller coaster has less mechanical energy at point C than point B because it has less PE at point C.

• The roller coaster has more mechanical energy at point A than point C more potential energy at point C.

• The roller coasters mechanical energy is the same at all location because ME is the sum of PE and KE.

Which object from the table has the LEAST momentum?

• Object A

• Object B

• Object C

• Object D

A 60kg runner change velocity from 5m/s to 10m/s in 5seconds. Calculate the impulse.

• 300 N*s

• 1,500 N*s

• 900 N*s

• 60 N*s

If a student does 500J of work pushing the box at a speed of 10m/s, what is the mass of the box in kg?

• 100kg

• 10kg

• 50kg

• 5000 kg

If a student does 50J of work pushing a 4kg box, what is the speed of the box?

• 200 m/s

• 100 m/s

• 5 m/s

• 25 m/s

What happens to the electrical force between two charge particle if you decrease the distance between them by half?

• Fore will quadruple.

• Force will remain the same.

• Force will be doubled.

• Force will be halved.