Which of the following does not represent the equation of motion for constant acceleration?
1. \(v=v_0+at\)
2. \(v^2=v_0^2+2a(x-x_0)\)
3. \(x = x_0v_0+\frac{1}{2}at^2\)
4. \(x = x_0+v_0t+\frac{1}{2}at^2\)

A ball is thrown vertically upwards with a velocity of \(20\) m/s from the top of a multistorey building. The height of the point from where the ball is thrown is \(25.0\) m from the ground. How high will the ball rise from the point of throw? (Take \(g=10\) m/s²)

A ball is thrown vertically upwards with a velocity of \(20\) m/s from the top of a multistorey building. The height of the point from where the ball is thrown is \(25.0\) m from the ground. How long will it be before the ball hits the ground? (Take \(g=10\) ms^-2.)
1. \(3\) s
2. \(2\) s
3. \(5\) s
4. \(20\) s

You can measure your reaction time by a simple experiment. Take a ruler and ask your friend to drop it vertically through the gap between your thumb and forefinger (figure shown below). After you catch it if the distance d travelled by the ruler is \(21.0\) cm, your reaction time is:

1. \(0.2\) s
2. \(0.4\) s
3. \(0\) 
4. \(0.1\) s

Galileo’s law of odd numbers: “The distances traversed, during equal intervals of time, by a body falling from rest, stand to one another in the ratio:

1.  as the odd numbers beginning with unity.

2.  as the even numbers beginning with unity.

3.  as the square of odd numbers beginning with unity.

4.  as the square of even numbers beginning with unity.