First slide

Application of Newtons laws

Question

In the figure, the mass m₂ starts with velocity v₀ and moves with constant velocity on the surface. During motion, the normal reaction between the horizontal surface and fixed triangle block m₁ is N. Then during motion

Moderate

A

$N = (m_{1} + m_{2}) g$
B

$N = m_{1} g$
C

$N < (m_{1} + m_{2}) g$
D

$N > (m_{1} + m_{2}) g$

Solution

As m₂ moves with constant velocity, there is no acceleration in the centre of mass. Net force should be zero. For this
$N = m_{1} g + m_{2} g = (m_{1} + m_{2}) g$

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