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Motion in A Plane
Question
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Two persons P and Q are standing 54 m apart on a long moving belt.  Person P rolls a round stone towards a person Q with a speed of 9 m/s with respect to belt. If the belt is moving with a speed of 4 m/s in the direction from P to Q. What is the speed of the stone w.r.to an observer on a stationary platform? 

Answer

Let the distance from P to Q be positive. 
Given, speed of the belt, vb = +4 m/s
Speed of the stone w.r.t belt, vs = + 9 m/s
Speed of the stone w.r.t a stationary observer= vs + vb = 9+ 4 = 13 m/s

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Some More Questions From Motion in A Plane Chapter

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?

Give one example of tensor.

What is module of vector?