forces and motion

Forces and Motion

The gradient of a distance – time graph is equal to the speed of the object

What is the speed of each of the sections?

Velocity is speed in a stated direction

Acceleration is how quickly velocity changes per second

A bus accelerates from 5 m/s to 25 m/s in 10s. What is the acceleration of the bus?

A lizard accelerates from 8 m/s to 20 m/s in 4 seconds. What is the lizard’s average acceleration?

Acceleration is the gradient of a velocity time graph

Calculate the acceleration in sections A,B and C – Try this one yourself

The area underneath a velocity – time graph is equal to the distance travelled

Split area into rectangles and triangles

What distance has been travelled in this case?

Now its your turn…………………..

What is the total distance travelled by this object?

The acceleration of an object depends on the objects mass and resultant

force acting on the object

A truck has a mass of 2,000kg.The driving force created by the engine is

3,000 Newtons.Calculate the acceleration caused by this

force.

A guinea pig of mass 1 kg sits on a skateboard of mass 2kg. If the skateboard is pushed, and accelerates at 4 m/s/s, how

big is the force pushing it?