SBQ -1 physics term 2 2019-2020

Which of the following is/are the unit(s) for work?

• Watt

• Newton. meter²

• joule

• Pascal

Which of the following bodies has the largest

kinetic energy?

• Mass 3M and speed V

• Mass 3M and speed 2V

• Mass 2M and speed 3V

• Mass M and speed 4V

What is the minimum energy needed to change

the speed of a 1600-kg sport utility vehicle from 15.0

m/s to 40.0 m/s?

• 1.10 MJ

• 10.0 kJ

• 20.0 kJ

• 40.0 kJ

The graph below shows the energy of a brick

dropped from a height of 8.0 𝑚. Based on the energy data in the graph, what is the approximate mass of the brick?

• 1 kg

• 2 kg

• 3 kg

• 4 kg

What type of energy is stored in a stretched

spring?

• Kinetic energy

• Elastic potential energy

• Chemical potential energy

• Gravitational potential energy

A spring has a spring constant of 330 N/m and the spring compressed to distance 0.45m. calculate the energy in the spring ?

• 34 J

• 165 J

• 375 J

• 0.105 J

At time 𝑡 = 1.0 𝑠, a 2.0 𝑘𝑔 object is falling with a speed of 4.0 𝑚/𝑠. What is the kinetic energy of the object at 𝑡 = 1.0 𝑠?

• 16J

• 20J

• 10J

• 12J

A small motor runs a lift that raises a load of bricks weighing 800 N to a height of 10 𝑚 in 2 𝑠. Assuming

that the bricks are lifted with constant speed, what is the minimum power the motor must produce?

• 8000W

• 4000W

• 2000W

• 3000W

What is the speed of a 2 𝑘𝑔 baseball whose kinetic energy is 100 𝐽?

• 2m/s

• 100m/s

• 10m/s

• 5m/s

What is the gravitational potential energy of a 3 𝑘𝑔 ball when it is 5 𝑚 above the floor?

• 300J

• 30J

• 50J

• 150J