G9 TERM 3

When the two objects collide, and they stick together, the collision is called perfectly inelastic collision.

• TRUE

• FALSE

What is the momentum of a large bus compared to that of a small car traveling at the same speed?

• The momentum of the bus is greater than the small car.

• The momentum of the bus is less than the small car.

• The momentum of the bus is equal to the small car.

• The momentum of the bus cannot be compared with the car.

What is the momentum of a fast-moving car compared to that of a slow-moving car with the same mass?

• The momentum of the fast-moving car is less than the slow-moving car.

• The momentum of the fast-moving car is greater than the slow-moving car.

• The momentum of the fast-moving car cannot be compared with the slow-moving car.

• The momentum of the fast-moving car is equal to the slow-moving car.

A larger bus and a small car move with the same velocity. Which of the following statements describe the impact of collision if both cars collided with a wall?

• The impact of collision cannot be determined.

• The impact of collision in the bus is equal to the car.

• The impact of collision is larger in the bus compared to the car.

• The impact of collision is smaller in the bus compared to the car.

When two objects collide, what happens to the momentum of the system?

• Momentum is lost.

• Momentum is gained.

• No momentum is gained.

• All momentums are lost.

Two objects with a total mass of 20kg has an initial momentum of 100kg⋅ms. If the masses stick together after the collision, what is the final velocity of the masses?

• 1 m/s

• 5 m/s

• 10 m/s

• 50 m/s

Which of the following are the two main types of mechanical energy?

• kinetic and potential

• radiant and gravitational

• chemical and nuclear

• kinetic and light

Calculate for the mechanical energy of an object that has a potential energy of 320 J and a kinetic energy of 280 J.

• 500 J

• 600 J

• 700 J

• 800 J

Which of the following states the law of conservation of mechanical energy?

• Mechanical energy in a system remains constant if only conservative forces act on the object.

• Mechanical energy in a system remains constant if only nonconservative forces act on the object.

• Mechanical energy in a system changes if only nonconservative forces act on the object.

• Mechanical energy in a system changes if only conservative forces act on the object.

  Points

What type of energy transformation is utilized in using solar panels at home?

• radiant to mechanical

• radiant to electrical

• kinetic to potential

• electrical to mechanical