362343
A ball is dropped on the floor from a height of \(10\,m\). It rebounds to a height of \(2.5\,m\). If the ball is in contact with the floor for \(0.01\,s\), then the average acceleration during contact is nearly
362344
Two balls of different masses \(m_{a}\) and \(m_{b}\) are dropped from two different heights \(a\) and \(b\). The ratio of the time taken by balls to cover these distances are:
1 1
2 \(\sqrt{a / b}\)
3 \(b: a\)
4 \(a: b\)
Explanation:
According to the relation \(h=u t+\dfrac{1}{2} g t^{2}\) \(h=\dfrac{1}{2} g t^{2} \quad(u=0)\) \(h \propto t^{2} \quad \therefore t \propto \sqrt{h}\) Hence, \(\dfrac{t_{a}}{t_{b}}=\sqrt{\dfrac{a}{b}}\)
362343
A ball is dropped on the floor from a height of \(10\,m\). It rebounds to a height of \(2.5\,m\). If the ball is in contact with the floor for \(0.01\,s\), then the average acceleration during contact is nearly
362344
Two balls of different masses \(m_{a}\) and \(m_{b}\) are dropped from two different heights \(a\) and \(b\). The ratio of the time taken by balls to cover these distances are:
1 1
2 \(\sqrt{a / b}\)
3 \(b: a\)
4 \(a: b\)
Explanation:
According to the relation \(h=u t+\dfrac{1}{2} g t^{2}\) \(h=\dfrac{1}{2} g t^{2} \quad(u=0)\) \(h \propto t^{2} \quad \therefore t \propto \sqrt{h}\) Hence, \(\dfrac{t_{a}}{t_{b}}=\sqrt{\dfrac{a}{b}}\)
362343
A ball is dropped on the floor from a height of \(10\,m\). It rebounds to a height of \(2.5\,m\). If the ball is in contact with the floor for \(0.01\,s\), then the average acceleration during contact is nearly
362344
Two balls of different masses \(m_{a}\) and \(m_{b}\) are dropped from two different heights \(a\) and \(b\). The ratio of the time taken by balls to cover these distances are:
1 1
2 \(\sqrt{a / b}\)
3 \(b: a\)
4 \(a: b\)
Explanation:
According to the relation \(h=u t+\dfrac{1}{2} g t^{2}\) \(h=\dfrac{1}{2} g t^{2} \quad(u=0)\) \(h \propto t^{2} \quad \therefore t \propto \sqrt{h}\) Hence, \(\dfrac{t_{a}}{t_{b}}=\sqrt{\dfrac{a}{b}}\)
362343
A ball is dropped on the floor from a height of \(10\,m\). It rebounds to a height of \(2.5\,m\). If the ball is in contact with the floor for \(0.01\,s\), then the average acceleration during contact is nearly
362344
Two balls of different masses \(m_{a}\) and \(m_{b}\) are dropped from two different heights \(a\) and \(b\). The ratio of the time taken by balls to cover these distances are:
1 1
2 \(\sqrt{a / b}\)
3 \(b: a\)
4 \(a: b\)
Explanation:
According to the relation \(h=u t+\dfrac{1}{2} g t^{2}\) \(h=\dfrac{1}{2} g t^{2} \quad(u=0)\) \(h \propto t^{2} \quad \therefore t \propto \sqrt{h}\) Hence, \(\dfrac{t_{a}}{t_{b}}=\sqrt{\dfrac{a}{b}}\)
