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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?
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Newton’s Second Law of Motion. 2 nd Law of Motion The net (total) force of an object is equal to the product of its acceleration and its mass. Force.
Newton’s Second Law of Motion The net force on an object is equal to the product of its acceleration and its mass. Force = Mass X Acceleration.
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Newton’s second law. Acceleration(m /s 2 ) Mass (kg) The acceleration of an object equals the net force divided by the mass. Net force (N) Newton’s second.
Chapter 18 Test Review. What is a reference point? The object that stays in place in relation to a moving object.
MOTION AND SPEED Chapter 2. Section 1 – Describing Motion A. Motion – when an object changes its position relative to a reference point 1. Distance –
Force = Mass x Acceleration (F = ma) Newton’s Second Law “Law of Acceleration”
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