A person travelling on a straight line moves with a uniform velocity v_1 for some time and with uniform velocity v_2 for the next equal time.

Is it 56m or 16m? And whichever the choice may be, but how do you decide it?

v2 – u2 = 2 a.s this give s = v2 - u2 / 2 a F = m a we can write work done (W) by this force F as W = m...

Mass of the motor car, m = 1200 kg  Initial velocity of the motor car, u = 90 km/h = 25 m/s  Final velocity of the motor car, v = 18 km/h...

Mass of the object, m1 = 1 kg  Velocity of the object before collision, v1 = 10 m/s  Mass of the stationary wooden block, m2 = 5 kg  Velocity of the wooden block...

(c)  2/v = 1/v1 + 1/v2. Explanation: Time taken during first phase =  x/v1 and during second phase =  x/v2.  Total distance =2x   Total time taken = (x/v1)+(x/v2) = x(1/v1 +1/v2)     Average velocity =Total distance/Total time taken ...

(b) is zero about a point on the straight line (c) is not zero about a point away from the straight line (d) about any given point remains constant. Explanation:  The angular momentum of...

The correct answer is (c) I∝1/r3

(c)  2/v = 1/v1 + 1/v2. Explanation: Time taken during first phase =  x/v1 and during second phase =  x/v2.  Total distance =2x   Total time taken = (x/v1)+(x/v2) = x(1/v1 +1/v2)     Average velocity =Total distance/Total...

(a) Task 1 can not be assigned to either person 1 or 2 i.e. there are 4 options. Task 2 can be assigned to 3 or 4 So, there are only 2 options...

(B) Uniform motion