Forces - Year 7

As a sky diver falls toward the Earth she experiences a downward force and an upwards force acting on her.

What is the cause of each of these forces?

• Gravity, Friction

• Gravity

• Gravity and Air drag

• Friction

A Force is...

• A push

• a push, pull or twist

• Gravity

• A twist

Look at the picture. If every person has the exact same strength, which team will win in "a."

• Red will win

• Green will win

• Tie

What units are used to measure forces?

• Grams

• Newtons and grams

• Newtons

• Kiloliters

What are the three things you can identify when a force acts?

• Changes in speed, direction, or shape

• Changes in speed, colour and sound

• Changes in speed and direction

• Changes in shape and size

What are the two natures of a force?

• Contact and non-contact

• Acting on a person or animal

• Nature....

• Changes shape or direction of an object

Magnetic force is a ....

• Contact force

• Non - contact force

• Forward force

• Backward force

Different forms of force include:

• Ground and sky

• Wind and air

• The elements

• Gravity,friction, magnetic etc.

The two forces shown in the diagram are acting on the boat. Look at the force arrows and determine which direction (Left or right) the boat will move.

• Left

• Forward

• Right

• Backward

What is Unbalanced Forces?

• Where the forces acting on an object are unequal, so the object moves in the direction of the strongest force.

• where the forces are all even

• where the forces acting on an object are unequal, so the object remains stationary.

• Where an object stops motion entirely