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Forces and Motion

This guide explores the fundamental concepts of forces and motion, focusing on speed, acceleration, and distance. It covers the gradient of distance-time and velocity-time graphs, providing examples of calculating speed and average acceleration for a bus and a lizard. You'll learn how to interpret velocity-time graphs, calculate the area under the graph to find distance traveled, and understand the relationship between mass, force, and acceleration through practical problems involving a truck and a guinea pig on a skateboard.

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Forces and Motion

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  1. Forces and Motion

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

  3. What is the speed of each of the sections?

  4. Velocity is speed in a stated direction

  5. Acceleration is how quickly velocity changes per second

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

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

  8. Acceleration is the gradient of a velocity time graph

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

  10. The area underneath a velocity – time graph is equal to the distance travelled Split area into rectangles and triangles

  11. What distance has been travelled in this case?

  12. Now its your turn………………….. What is the total distance travelled by this object?

  13. The acceleration of an object depends on the objects mass and resultant force acting on the object

  14. 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.

  15. 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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