Force, Motion, Energy (7th/8th)

Balanced or Unbalanced?

• Balanced

• Unbalanced

The mass of truck is greater than the mass of the sports car. Which will experience the LEAST acceleration?

• The truck

• The sports car

TOTAL MASS of boy and his bicycle = 54 kg

Boy is pushing with a net force of 250 NEWTONS

What is the acceleration?

Hint: Newtons ÷ Total Mass

ROUND the answer to the nearest TENTH

• 250 ÷ 54 = 4.63

• 54 ÷ 250 = 0.22

Newton's 3rd Law: For every action, there is an equal and opposite reaction. How does this apply in basketball?

• The gym floor pushes up on the ball. The ball pushes down on the floor. Equal force.

• The gym floor pushes up on the ball. The ball pushes down on the floor. Unequal force.

What is the FORCE?

Mass = 550 kg

Acceleration = 5 m/s²

Force = Mass x Acceleration

• 550 x 5 = 2,750 N

• 550 ÷ 5 = 110 N

Change in direction: Balanced or Unbalanced force?

Balanced = zero N

Unbalanced = NOT zero N

• Balanced Force

• Unbalanced Force

Constant speed and direction: Balanced or Unbalanced force?

Balanced = zero N

Unbalanced = NOT zero N

• Balanced Force

• Unbalanced Force

Net force = zero: Balanced or Unbalanced force?

Balanced = zero N

Unbalanced = NOT zero N

• Balanced Force

• Unbalanced Force

Change in speed: Balanced or Unbalanced force?

Balanced = zero N

Unbalanced = NOT zero N

• Balanced Force

• Unbalanced Force

Net Force GREATER THAN ZERO: Balanced or Unbalanced force?

Balanced = zero N

Unbalanced = NOT zero N

• Balanced Force

• Unbalanced Force