Advertisements
Advertisements
प्रश्न
A football player kicks a 0.8 kg ball and imparts it a velocity of 12 ms-1. The contact between the foot and ball is only for one-sixtieth of a second. Find the average kicking force.
Advertisements
उत्तर
Given,
Mass of the ball = 0.8 kg
Final velocity (V) =12 ms-1 and time t =`1/60` s
Initial velocity = 0
We know the average kicking force
F = ma = `(m(v–u))/t = (0.8(12−0))/((1/60))`
F = 576 N
APPEARS IN
संबंधित प्रश्न
The centrifugal force appears to exist ______
If a person moving from pole to equator, the centrifugal force acting on him ______
Under what condition will a car skid on a leveled circular road?
A car takes a turn with a velocity of 50 ms-1 on the circular road of a radius of curvature of 10 m. calculate the centrifugal force experienced by a person of mass 60 kg inside the car?
Two bodies of masses 15 kg and 10 kg are connected with light string kept on a smooth surface. A horizontal force F=500 N is applied to a 15 kg as shown in the figure. Calculate the tension acting in the string?
Imagine that the gravitational force between Earth and Moon is provided by an invisible string that exists between the Moon and Earth. What is the tension that exists in this invisible string due to Earth’s centripetal force? (Mass of the Moon = 7.34 × 1022 kg, Distance between Moon and Earth = 3.84 × 108 m)
A bob attached to the string oscillates back and forth. Resolve the forces acting on the bob into components. What is the acceleration experienced by the bob at an angle θ?
Calculate the centripetal acceleration of the Moon towards the Earth.
Explain the need for banking of tracks.
Briefly explain ‘centrifugal force’ with suitable examples.
