grade 4 , con 6 , lesson 1

When objects collide with each other, ...........is transferred between them.

• time

• distance

• energy

• nothing

The object that has the most kinetic energy, is................ object.

• the fastest and lightest

• the slowest and lightest

• the fastest and heaviest

• the slowest and heaviest

A wrecking ball is made of................

• plastic.

• nylon.

• steel.

• wood.

In cricket game, the bat transfers its ........energy to the ball.

• kinetic

• potential

• thermal

• chemical

Collisions usually produce.........

• solar energy.

• sound energy.

• gravitational potential energy.

• chemical potential energy.

When the cricket bat hits the ball, the ball direction ......... and the ball speed...........

• doesn't change - doesn't change.

• doesn't change - changes.

• changes - doesn't change.

• changes - changes.

Seatbelts work when the car................

• decreases its speed gradually.

• increases its speed gradually.

• suddenly stops.

• stops gradually.

If there is nothing to stop a moving object, this object will ..............

• stay in motion.

• stop after few hours.

• stop after few minutes.

• stop after few seconds.

When a car that moves forward stops suddenly, the passengers move.........

• backward.

• forward.

• upward.

• downward.

Airbags in the car are folded into all the following places, except..................

• steering wheel.

• dashboard.

• doors.

• tires.