Basic Maths and Units and DimensionsHard
Question
A3kg ball strikes a heavy gird wall with a speed of 10 m/s at an angle of 60o. It gets with the same speed and angle as shown here. If the ball is in contact with wall for 0.20s, what is the average force exerted on the ball by the wall?
Options
A.150 N
B.zero
C.150
D.300N
Solution
Change in momentum along the wall = mv cos 60o - mv cos60o = 0
Change in momentum perpendicular to the wall
= mv sin 60o -(- mv sin60o) = 2 mv sin 60o
∴ Applied force
= 50 × 3√3
= 150√3 newton
Change in momentum perpendicular to the wall
= mv sin 60o -(- mv sin60o) = 2 mv sin 60o
∴ Applied force
= 50 × 3√3 = 150√3 newton
Create a free account to view solution
View Solution FreeTopic: Basic Maths and Units and Dimensions·Practice all Basic Maths and Units and Dimensions questions
More Basic Maths and Units and Dimensions Questions
The refracting angle of a prism is A, and refractive index of the material of the prism is cot(A/2). The angle of minimu...Two identical straight wires are stretched so as to produce 6 beats/sec when vibrating simultaneously. On changing the t...Which of the following bulbs will have maximum brightness :-...Two plates of same area are placed in series. Their thickness as well as thermal conductivities are in the ratio 2 : 3, ...Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the seco...