Year10_intro_Physics

• upthrust

• start velocity

• end velocity

• time

2. Lewis Hamilton decelerates from 300km/h to 50km/h over 3s coming into a bend. What is the approximate rate of decceleration?

• 250km/h/s

• -83 km/h/s

• 83 km/h/s

• 750km/h/s

3. A cyclist accelerates uniformly from 5m/s to 9m/s over 4s. What distance do they travel over this time?

• 1.75m

• 20m

• 28m

• 36m

4. How long does it take a plane to fly 10000 km at an average speed of 1000 km/h? 

• 1 min

• 10 s

• 10 h

• 1 h

5. How much does a cat of mass 3kg weigh on the moon? (g = 1.7N/kg)

• 0.57 N

• 1.76 N

• 3kg

• 5.1 N

• 6.6s

• 136, 364 Hz

• 136, 363 Hz

7. What is the efficiency of the electric car?

• 20 %

• 400 %

• 80 %

• 120 J

8. An object floats in liquid X, but sinks in liquid Y. Which of the following are true?

• Wood is denser than both X and Y 

• X is denser than Y 

• Y is denser than wood 

• Wood is denser than X

9. Calculate the resistance if a voltage of 1500 V causes a current of 2 A

• 3000 R

10. Calculate the voltage required to cause a current of 3 A to flow through a resistance of 5 Ω. 

• 160 W

• 1.67 V

• 15 V

• 0.6V