grade 4 , con 6 , lesson 3

When the speed of a moving object increases, the energy that transfers during its collision will.............

• increase.

• decrease.

• not change.

• equal zero.

A fast-moving object has............ that of a slow-moving object.

• the same energy as

• more energy than

• less energy than

• no energy as

The two factors affecting the kinetic energy of an object are...........

• its speed and the color.

• its mass and the color.

• its speed and the mass.

• its light and the sound energies.

As the mass of a vehicle increases, it needs ..............to................

• less force - less potential energy.

• more force - more potential energy.

• less force - less kinetic energy.

• more force - more kinetic energy.

When two objects of the same mass move with the same speed collide with each other, the resulted damage...........

• is larger in one of them and smaller in the other.

• is equal in both of the two objects.

• doesn't depend on the mass of the two objects.

• doesn't depend on the speed of the two objects.

On collision, energy is........ ......

• created.

• destroyed.

• created and transferred.

• transferred and change.

When car and truck collide with each other in opposite directions,............

• the car has more energy and cause more damage.

• the truck has more energy and cause more damage.

• the car has less energy and cause more damage.

• the truck has less energy and cause less damage.

All the following factors affect the kinetic energy of a moving car, except...........

• the mass of the car.

• the pushing force of the car engine.

• the airbags inside the car.

• the inclination of the road on which the car moves.

The mass of an object...............

• doesn't affect its potential energy or its kinetic energy.

• affects its potential energy and its kinetic energy.

• affects its potential energy only.

• affects its kinetic energy only.

During collision between two objects there is no change of energy occur

• true

• false