Science 101

A net force is acting when an object is. . .

• Accelerating

• Not moving / Stationary

• Changing direction

• Moving constantly in a straight line

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

A net force is acting when an object is. . .

• Accelerating

• Changing shape

• Changing direction

• Moving constantly in a straight line

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

If a net force is acting an object will be accelerating or decelerating,which equation should you use?

• F = m x a

• F = P x A

• F = W/d

• F = m x g

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

What is a net force?

• A net force is total force acting on an object once all the forces acting have been added together.

• It is the only force acting an an object

• It is all the big forces acting on an object.

• It is any force acting on an object

Tags

NGSS.MS-PS2-2

The rate of change of speed per time

• velocity

• speed

• time

• acceleration

In a distance-time graph, the gradient of a sloping straight line shows

• object has stopped

• object is at constant speed

• object is accelerating

• object is returning to start position

How many cm are there in 1.2 m

• 12

• 120

• 1200

• 12000

v = Δd / Δt is used to calculate speed

Δt =

• Δd ÷ v

• Δd × v

• v ÷ Δd

• none of these

A car is travelling at -1.75 ms^-2. It is

• accelerating

• travelling at constant speed

• going backwards (reversing)

• decelerating

A decomposition reaction can be represented as _____________________.

• AB  → A + B
• A + B → AB
• AB + CD → AC + BD
• A + BC → B + AC