the velocity of a body of mass 20 kg decreases from 20 m/s to 5m/s in a distance of 100 m .force on the body is.
Answers
Answered by
2
Thanks and keep going
Attachments:
Answered by
1
Initial velocity = u = 20m/s
final velocity = v = 5m/s
distance = s = 100m
mass = m = 20kg
acceleration = a = ?
force = F = ?
v²-u² = 2as
(5²-20²) = 2(a)(100)
25-400 = 200a
-375 = 200a
-375/200 = a
- 1.875m/s² = a
F = mass × acceleration
F = 20kg × -1.875 m/s²
F = 37.5 kgm/s²
F = 37.5 N
final velocity = v = 5m/s
distance = s = 100m
mass = m = 20kg
acceleration = a = ?
force = F = ?
v²-u² = 2as
(5²-20²) = 2(a)(100)
25-400 = 200a
-375 = 200a
-375/200 = a
- 1.875m/s² = a
F = mass × acceleration
F = 20kg × -1.875 m/s²
F = 37.5 kgm/s²
F = 37.5 N
Similar questions