100kg car speed 20m/s to rest distance of 50 m.calculate(1)acceleration(2)unbalanced force
Answers
Answered by
0
intial speed = u = 20m/s
final speed = v = 0m/s
distance = s = 50m
mass = m = 100kg
acceleration = a = ?
force = F = ?
_________________
1)
v²-u² = 2as
v²-u²/2s = a
a = v²-u²/2s
a = (0)²-(20)²/2(50)
a = 0-400/100
a = -400/100
a = -4
a = 4 (because speed I'd scalar quantity means it has only magnitude not direction) .
__________________________________
2)
Force = mass × acceleration
F = m × a
F = 100 × 4
F = 400N
so force = 400newton .
_____________________________
final speed = v = 0m/s
distance = s = 50m
mass = m = 100kg
acceleration = a = ?
force = F = ?
_________________
1)
v²-u² = 2as
v²-u²/2s = a
a = v²-u²/2s
a = (0)²-(20)²/2(50)
a = 0-400/100
a = -400/100
a = -4
a = 4 (because speed I'd scalar quantity means it has only magnitude not direction) .
__________________________________
2)
Force = mass × acceleration
F = m × a
F = 100 × 4
F = 400N
so force = 400newton .
_____________________________
Similar questions