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Transcript
```Year 10
Science
Name_____________________________________
Newton’s Laws of Motion
1. Which force prevents a bus falling through the road?
2. List two forces that act against the forward motion of a car.
3. Describe your motion (as a passenger on a bus) if the bus...
a) Does a quick right turn?
b) A slow left turn?
c) An emergency stop at 60 km/hr?
4. The gravity on Mars is only 3.7 m/s2. What would your weight be on Mars?
5. Explain in terms of Newton’s First law of Motion why you should wear a seat belt in a vehicle.
6. What total force would cause a 1.5 kg glass bowl to accelerate across a table at 0.2 m/s2?
7. List 3 pairs of action and reaction forces.
8. Who invented the first rockets and what were they used for?
Using Newton’s Second Law of Motion
Name_________________
1. How much horizontal net force is required to accelerate a 1000 kg car at 2 m/s2? (N)
Solution:
2. What total force would cause a 1.5kg salad bowl to accelerate across the table at 0.30 m/s2? (N)
Solution:
3. A net force of 10 Newtons acts on a box which has a mass of 2 kg. What will be the acceleration of the box?
(m/s2)
Solution:
4. A jet airplane accelerates on the runway at 3.0 m/s2. It has two engines which exert a total thrust of 3.0 x 105
N. What is the mass of this airplane? (tonnes)
Solution:
5. A 10 kg sled is pulled across the snow so that the total force acting on it is 12 N. What is the size of the
acceleration of the sled? (m/s2 )
Solution:
6. Two identical toy carts A and B each with a mass of 1.0 kg are pushed across a smooth level table with the
same force. One of them carries a heavy brick. Cart A accelerates more rapidly than Cart B.
Solution:
a) Which toy cart contains the brick? How do you know?
b) If the acceleration of Cart A is 2.0 m/s2 what is the total force acting on each cart?
```