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1. Please can you help me with this question?
Rob's go-cart has a mass of 40 kg. Rob's mass is 30 kg.
1. What is the mass of go-cart with Rob in it?
2. Karishma pulls the cart with a force of 105 N. What is its initial acceleration?
3. Why does the acceleration decrease as the go-cart goes faster?
4. The go-cart reaches a maximum speed of 6 m/s. Explain why it doesn't go any faster.
Thanks. Jo, age 15.

2. Please explain freefall, orbits and weightlessness?

3. What is the term for when an object is being squashed, and what is the term for when it's being stretched ?

4. Force of 20 newtons pushing forward and 30 newtons pushing backwards, what direction would it move ?

5. What determines the velocity of a squash ball ?

6. What determines the velocity of a squash ball ?

7. How do pulleys work ?

8. A car has an engine which will produce a driving force of 4,500 Newtons. What is the resultant force and acceleration at 70mph ?

9. A car has an engine which will produce a driving force of 4,500 Newtons. What is the resultant force and acceleration at 70mph ?

10. A car has an engine which will produce a driving force of 4,500 Newtons. What is the resultant force and acceleration at 70mph ?

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