Concept explainers
(a)
To Find:The range of a ball thrown horizontally while standing on level ground.
(a)
Answer to Problem 36P
Explanation of Solution
Given data:
The ball is thrown horizontally.
Formula used:
Second equation of motion:
Calculation:
Applying
Applying
Substituting value of t in
Assume that the person can throw the ball at 60 mph.
Assume that the person releases the ball from a height of 2 m.
Substituting the values for v and h
Conclusion:
Thus, the range of a ball thrown horizontally while standing on level ground =
(b)
To Find:The range of a ball thrown at an angle 45° above the horizontal while standing on level ground
(b)
Answer to Problem 36P
Explanation of Solution
Given data:
The ball is thrown at an angle 45° above the horizontal.
Formula used:
Calculation:
Assume that the person can throw the ball at 60 mph.
Assume that the person releases the ball from a height of 2 m.
Let the angle of release of the ball from the horizontalbe
Applying
Applying
Substituting value of t in
Solving for R
There are 2 values for R. Taking the larger value,
Substituting values for v, h,
Conclusion:
The range of a ball thrown at an angle 45° above the horizontal =
(c)
The range of a ball thrown horizontallyfrom the top of a building
(c)
Answer to Problem 36P
The range of a ball thrown horizontally from the top of a building =
Explanation of Solution
Given data:
The ball is thrown horizontallyfrom the top of a building
Formula used:
Calculation:
Assume that the person can throw the ball at 60 mph.
Assume that the person releases the ball from a height of 2 m.
Applying
Applying
Substituting value of t in
Substituting values for v, h,and g
Conclusion:
The range of a ball thrown horizontally from the top of a building =
(d)
The range of a ball thrown at an angle 45° above the horizontal from the top of a building 12 m high
(d)
Answer to Problem 36P
The range of a ball thrown at an angle 45° above the horizontal from the top of a building 12 m high =
Explanation of Solution
Given data
The ball is thrown at an angle 45° above the horizontal from the top of a building 12 m high.
Formula used
Calculation
Assume that the person can throw the ball at 60 mph.
Assume that the person releases the ball from a height of 2 m.
Let the angle of release of the ball from the horizontalbe
Applying
Applying
Substituting value of t in
Solving for R
There are 2 values for R. Taking the larger value,
Substituting values for v, h,
Conclusion
The range of a ball thrown at an angle 45° above the horizontal from the top of a building 12 m high =
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Chapter 3 Solutions
Physics for Scientists and Engineers, Vol. 3
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