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Motion In A Plane

Question

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Two persons A and B are walking with speed 4 km/hr and 5 km/hr respectively in the same direction. Find how far will be B from A after 3 hours?

Solution

Relative velocity of B w.r.to A,
v_BA = v_B - v_A
= 5- 4 = 1 km/hr
Therefore, distance of B ahead of A in time is,
d = v_AB x t
= 1 x 3
= 3 km

Some More Questions From Motion in A Plane Chapter

Name a quantity which is both scalar as well as vector.

Which of the followings is/are vector quantities: work, power, acceleration, mass, momentum?

Pick up the odd one from the following: force, linear momentum, mass, impulse.

Pick out the only vector quantities in the following list:
Temperature, pressure, impulse, time, power, total path length, energy, gravitational potential, coefficient of friction and charge.

Pick out the two scalar quantities in the following list:
force, angular momentum, work, current, linear momentum, electric field, average velocity, magnetic moment, reaction as per Newton’s third law, relative velocity.

What are polar vectors?

Give two examples of polar vectors.

What are axial vectors?

Give two examples of axial vectors.

What are tensors?

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