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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?
REVISION What two parts make up the stopping distance of a vehicle?
Motion and Force A. Motion 1. Motion is a change in position
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What is the unit of force in the metric system? A) kilogram B) gram C) newton D) meter/second.
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.
Section 2.3 Gravity and Free Fall. Acceleration due to Gravity ► ► An object is in free fall if it is accelerating due to the force of gravity and no.
An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the.
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