You can only make this calculation if you assume that the car is "coasting" in neutral with zero friction. These are rather unrealistic assumptions for driving a car.
I suggest you make these assumptions anyway use conservation of energy to predict the speeds.
Assume the height of a hill is 50m, calculate:
a.the velocity of a car at the bottom ofg the hill
b.the height at which it will have half the speed. Assume the car starts from rest at the top of the hill.
3 answers
A hill is of height 50 meters calculate (a)the velocity of the car at the bottom of the hill.(2)the height at which it will have half d speed.Assume the car starts from rest at the top of the hill
H=5om, v=?
P.E =K. E
Mgh =1/2mv^2
10× 50m =v^2 /2
2×10×50 =v^2
V = √1000
V=31. 62m/s
1/2 of speed (v)
1/2 × 31.62=15.81
P.E↓1 + K.E↓1=P.E↓2+K.E↓2
Mgh+ 1/2 mu^2 = mgh +1/2 mv^2
M×10×50= m×10h+ 1/2m × 15.81^2
Tired of typing☺️🙄🙄
P.E =K. E
Mgh =1/2mv^2
10× 50m =v^2 /2
2×10×50 =v^2
V = √1000
V=31. 62m/s
1/2 of speed (v)
1/2 × 31.62=15.81
P.E↓1 + K.E↓1=P.E↓2+K.E↓2
Mgh+ 1/2 mu^2 = mgh +1/2 mv^2
M×10×50= m×10h+ 1/2m × 15.81^2
Tired of typing☺️🙄🙄
1 answer