Physicshard · Past Paper
A particle has an initial velocity of 3i + 4j and an acceleration of 0.4i + 0.3j. Its speed after 10s is:
A7 units
B7*sqrt(2) units
C10 units
D5 units
✓ Correct Answer: B — 7*sqrt(2) units
v = u + at = (3+4)i + (4+3)j = 7i + 7j. Speed = sqrt(7^2 + 7^2) = 7*sqrt(2).
Share this question
More from Physics
- A person can jump higher on the moon than on Earth because:
- A body of mass 5 kg is moving with a velocity of 2 m/s. If its velocity is increased to 4 m/s, the work done is:
- A physical quantity that has both magnitude and direction is called:
- Which of the following describes the distance from one crest to the next in a transverse wave, or one compression to the next in a longitudinal wave?
- If a body is taken from Earth to the Moon, its mass: