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Grade: 11

                        

a packet of weight W is dropped with the help of a parachute and on striking the ground comes to reat with a retardation equal to twice the acceleration due to gravity. what is the force exerted on the ground? W 2W 3W 4W

5 years ago

Answers : (1)

VIGNESH VENKATESH
23 Points
							
F=dp/dt
F=m(dv/dt)
Since W=mg, therefore m=W/g
dv/dt=2g (since acceleration)
THEREFORE, F=(W/g)*2g=2W
one year ago
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