The situation that will help reduce frictional force.

When there is friction between moving parts of machine ________ is produced

Friction is a force that acts in the ______ direction of the intended motion of an object.

_____________ is a force of attraction that pulls together all matter

Which force always pulls objects downward?

What force will be used by the brakes to stop a bike?

Which type of friction is the weakest?

Which of the following has the greatest friction?

Which shows that friction is undesirable?

The boat sailing on the sea slows down. What kind of friction is acting on it?

Where is the gravitational force directed as you stand on the floor?

What is the direction of the frictional force that acts on an object moving to the left?

How can you best reduce friction between the bottom or feet of furniture and the floor?

Which of the following statement is true ?

Which of the following is an example of increasing friction?

A boy sits on a grassy slope. What force stops him from sliding down?

What force of friction experienced by a body when it is at rest?

What frictional force experienced by the body when it rolls over another?

What type of energy do plants use to make sugar in the photosynthesis process?

GRAVITY IS A CONTACT FORCE THAT ACTS BETWEEN TWO SEPARATE OBJECTS.

FRICTION KEEPS OBJECTS FROM SLIDING OFF SURFACES

THE PRINCIPLE OF GRAVITY WAS DISCOVERED BY SIR ISAAC NEWTON.

THE LESSER THE MASS OF AN OBJECT , THE GREATER THE PULL OF GRAVITY ON IT.

GRAVITY KEEPS ANYTHING FROM GOING UP.

Food, batteries, and fuel such as gasoline are similar because they are sources of _________ energy.

What type of energy is stored in the particles of matter?

What type of energy flows through the wires in an electrical circuit?

Electrical Energy is:

The energy caused by an object's vibrations

Michael is yelling to his friend across the street. This is an example of:

Which of the following produces mechanical energy?

Which of the following describes nuclear energy?

Why is electrical energy very useful in our homes?

Setting the alarm clock of her cellphone to aware what time she will wake up the next morning.

II. Identify whether it is friction, force or gravity. ____________bouncing ball

Identify whether it is friction, force or gravity. ___________pulling the box

Identify whether it is friction, force or gravity. ___________ falling coconut

Identify whether it is friction, force or gravity. _________ moving car towards the cliff

Identify whether it is friction, force or gravity. ____________ rubbing two sticks together

Identify whether it is friction, force or gravity. _______________ pushing the cart