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Question 35: What is the momentum in kg. m/s of a 10 kg car travelling at (a) 5 m/s (b) 20 cm/s, and (c) 36 km/h?
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Answer:
(a) 5 m/s
We know that:
Momentum = mass × velocity
= m × v
Here, mass, m = 10 kg
velocity, v = 5 m/s
Putting these values in the above formula, we get:
Momentum = 10 × 5 kg.m/s
= 50 kg.m/s
(b) 20 cm/s
We know that:
Momentum = mass × velocity
= m × v
Here, mass, m = 10 kg
velocity, v = 20 cm/s
v = 0.2 m/s
Putting these values in the above formula, we get:
Momentum = (10)(0.2) kg.m/s
= 2 kg.m/s
(c) 36 km/h
We know that:
Momentum = mass × velocity
= m × v
Here, mass, m = 10 kg
velocity, v = 36 km/h
Putting these values in the above formula, we get:
Momentum = 10 × 10 kg.m/s = 100 kg.m/s
We know that:
Momentum = mass × velocity
= m × v
Here, mass, m = 10 kg
velocity, v = 5 m/s
Putting these values in the above formula, we get:
Momentum = 10 × 5 kg.m/s
= 50 kg.m/s
(b) 20 cm/s
We know that:
Momentum = mass × velocity
= m × v
Here, mass, m = 10 kg
velocity, v = 20 cm/s
v = 0.2 m/s
Putting these values in the above formula, we get:
Momentum = (10)(0.2) kg.m/s
= 2 kg.m/s
(c) 36 km/h
We know that:
Momentum = mass × velocity
= m × v
Here, mass, m = 10 kg
velocity, v = 36 km/h
Putting these values in the above formula, we get:
Momentum = 10 × 10 kg.m/s = 100 kg.m/s
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Question Text | Question 35:
What is the momentum in kg. m/s of a 10 kg car travelling at (a) 5 m/s (b) 20 cm/s, and (c) 36 km/h? |
Topic | Force and Laws of Motion |
Subject | Science |
Class | Class 9 |
Answer Type | Text solution:1 |
Upvotes | 12 |