Consider a car traveling west at 60 MPH. The passenger throws a ball in the same direction the car is traveling. If the passenger clocks the speed of the ball at 40 MPH, what is the speed of the ball relative to the road?

100 MPH

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60 MPH

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cannot determine with information available

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40 MPH

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20 MPH

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Solution

The correct option is D 100 MPH
The initial speed of ball relative to road ,before throw is $60 m i l e s / h r$ , after throw ball gains an extra speed of $40 m i l e s / h r$ . Therefore, total speed of ball $60 + 40 = 100 m i l e s / h r$ .
Speed of ball relative to road will be $= 100 - 0 = 100 m i l e s / h r$

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Consider a car traveling west at 60 MPH. The passenger throws a ball in the same direction the car is traveling. If the passenger clocks the speed of the ball at 40 MPH, what is the speed of the ball relative to the road?

The correct option is D 100 MPHThe initial speed of ball relative to road ,before throw is 60 miles/hr, after throw ball gains an extra speed of 40miles/hr. Therefore, total speed of ball 60+40=100miles/hr.Speed of ball relative to road will be =100−0=100miles/hr