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

Question

Physics

Abel Mitchell

14 May, 06:18

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

+2

Answers (2)

Know the Answer?

Miranda · Answer 1

P = m * v

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

P = 20 * 5

P = 100 kg m/s

Weston · Answer 2

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.