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A shot putter with a mass of 80 {~kg} pushes an iron ball of m

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Solving time: 4 mins

A shot putter with a mass of $80 kg$ pushes an iron ball of mass $6 kg$ from a standing position. The ball is accelerated uniformly from rest at an angle of $4 5^{\circ}$ with the horizontal. This is done within a time interval of $0.1 s$ . The ball leaves his hand when it is $2 m$ high above the ground level and hits the ground $2 s$ later. The minimum value of the static coefficient of friction, if the shot putter does not slip during the throw, is closest to

0.28

0.40

0.68

0.58

Views: 5,149 students

Book:

Physics for JEE Main and Advanced Mechanics 1 (McGraw Hill)

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Noah Discussed

A shot putter with a mass of

80 kg

pushes an iron ball of mass

6 kg

from a standing position. The ball is accelerated uniformly from rest at an angle of

4 5^{\circ}

with the horizontal. This is done within a time interval of

0.1 s

. The ball leaves his hand when it is

2 m

high above the ground level and hits the ground

2 s

later. The minimum value of the static coefficient of friction, if the shot putter does not slip during the throw, is closest to

14 mins ago

Discuss this question LIVE

14 mins ago

Text solutionVerified

The force exerted by shot putter to the ball in horizontal direction the same force experienced by shot putter in horizontal direction This force is balanced by friction to the shot putter

F sin 4 5^{\circ} = f

....(1)

N = m g + f sin 4 5^{\circ}

....(2)

f = μ

....(3)
From eq

(1) (2)

and

(3)

\Rightarrow μ = \frac{F cos 4 5 ^{\circ}}{m g + F sin 4 5 ^{\circ}}, μ \frac{540}{800 + 540} ∴ F = 5402 N μ = 0.4

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Question Text	A shot putter with a mass of $80 kg$ pushes an iron ball of mass $6 kg$ from a standing position. The ball is accelerated uniformly from rest at an angle of $4 5^{\circ}$ with the horizontal. This is done within a time interval of $0.1 s$ . The ball leaves his hand when it is $2 m$ high above the ground level and hits the ground $2 s$ later. The minimum value of the static coefficient of friction, if the shot putter does not slip during the throw, is closest to
Topic	Laws of motion
Subject	Physics
Class	Class 11
Answer Type	Text solution:1
Upvotes	95

Text solutionVerified

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