Motion. class 11

Consider a body moving with an acceleration of 2 m/s². After t seconds its velocity is 10 m/s. Find ‘t’.

• 4S

• 20S

• 5S

• 8S

Answer explanation

Answer: (c) 5 s

Explanation: V=U+at

t=v-u/a = 10/2= 5 s

Unit of acceleration is _________________

• 1. m²s

• m/s

• m/s2

• m/s3

Answer explanation

Answer: (c) m/s2

Explanation: The unit of acceleration is m/s2.

Motion of an object or a part of it around a fixed point is known as ___ motion.

Answer explanation

The motion of an object or a part of it around a fixed point is known as circular motion.

The motion of blades of a fan is an example of circular motion.

SI unit of length is __

Answer explanation

SI unit of length is metre.

Under what condition is the relation  s=vt correct?

Answer explanation

The relation  s=vt  is valid when the particle moves with uniform velocity and along a straight line.