Aqa force and motion
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Forces and motion are discussed. Key points include: - Velocity is speed in a stated direction and acceleration is the rate of change of velocity over time. - A bus accelerates from 5 m/s to 25 m/s in 10s, so its acceleration is 2 m/s2. A lizard accelerates from 8 m/s to 20 m/s in 4s, so its average acceleration is 3 m/s2. - Acceleration can be calculated from the gradient of a velocity-time graph. The area under a velocity-time graph equals the distance traveled.
Aqa force and motion
- 2. The gradient of a distance ¨C 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 ¨C Try this one yourself
- 10. The area underneath a velocity ¨C 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?