A blue puck has a velocity of 3i - 4j m/s. Its mass is 20 kg. What is its momentum?

Question

Physics

Nemo

19 July, 17:37

A blue puck has a velocity of 3i - 4j m/s. Its mass is 20 kg. What is its momentum?

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Answers (2)

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Denzel Nguyen · Answer 1

Magnitude:

√ (3² + 4²) = √ (9 + 16) = √25 = 5

Momentum = (mass) x (velocity) = (20kg x 5m/s) = 100 kg-m/s

Direction:

3i - 4j is in the direction tan⁻¹ (-4/3) = 53.1 south of east.

Jayvion Whitney · Answer 2

P = m * v

v = {3i - 4j} = square root (3^2 + 4^2) = 5

P = 20 * 5

P = 100 kg m/s