Question : A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that:

Option 1: The rubber ball suffers a greater change in momentum

Option 2: The metal ball suffers a greater change in momentum

Option 3: Both suffer the same change in momentum

Option 4: The initial momentum of the rubber ball is greater than that of the metal ball

Question : Planck's Constant has the dimensions of:

Option 1: Energy

Option 2: Linear momentum

Option 3: Angular momentum

Option 4: Force

Question : What is the Earth's escape velocity?

Option 1: 2.8 km/s

Option 2: 5.6 km/s

Option 3: 11.2 km/s

Option 4: 14 km/s

Question : The ratio of Ram's salary to Shyam's salary is 3 : 4. The ratio of Shyam's salary to Ghanshyam's salary is 5 : 6. What will be the ratio of Ram's salary to Ghanshyam's salary?

Option 1: 3 : 5

Option 2: 5 : 8

Option 3: 4 : 5

Option 4: 3 : 8

Question : Find the length of the arc if the angle at the centre of the circle of radius 7 units is 60°.

Option 1: $4$ units

Option 2: $\frac{11}{4}$ units

Option 3: $\frac{22}{3}$ units

Option 4: $21$ units