Practice Questions
1.What information will the gradient of a velocity time graph give us?
Acceleration
2. How can you tell if the acceleration is uniform from a velocity time graph?
If the velocity time graph is a straight line, then the acceleration is uniform. Uniform acceleration means that the acceleration has a constant value
3. How could you identify if an object is not accelerating by examining the velocity time graph?
If the object is not accelerating, then the line on the velocity time graph will be horizontal, so the gradient is 0 and the acceleration is zero.
4. A ball is thrown upwards in the air, where it reaches a maximum height and then falls back to its original position. Use the velocity time graph below to answer the following questions.
4a.Describe the motion of the ball between 0 to 0.5 seconds.
The ball is moving upwards with constant or uniform acceleration
4b.State the time when the ball reached its maximum height
The ball reached its maximum height when the velocity is 0m/s. The time at which this happened is approx 0.9 seconds.
4c.How long did it take for the ball to reach its original position?
Two seconds
4d.State the time period when the ball is falling.
Approx 0.9-2 seconds
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JJ Thomson and Plum pudding model
Ernest Rutherford and the Nuclear Model
Niels Bohr changing the Nuclear Model
Discovering the Proton and Neutron
Measuring radiation from radioactivity
Radiation types and properties
Random nature of radioactive decay
Radioactive contamination or irradiation
Hazards of contamination and irradiation
Studies on the effects of radiation on humans
Different half lives of radioactive isotopes
Nuclear Fission Chain Reaction
Writing nuclear fission equations
Accordion Content
Accordion Content