a constant net force of 200N is exerted to accelerate a cart from rest to velocity of 40m/s in 10s. what is the mass of the car?
2007-02-04 22:02:12 · 2 answers · asked by antoinekingx 1 in Science & Mathematics ➔ Physics
Simple. F = ma. So m = F/a.
a = acceleration = 40/10 = 4.
So m = 200/4 = 50.
2007-02-04 22:09:40 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The Car Starts from rest so the initial velocity is zero
u = 0m/s
Final velocity of car after acceleration = 40m/s
v = 40m/s
The time taken to accelerate = 10 s
The acceleration "a" of a body is given by
a=(v-u)/t
therefore a=(40-0)/10
=4m/s^
Now The constant net force "F" acting on the body= 200N
Force acting on a body is calculated by the formula
F=m*a
where m is the mass of the body
so usin the above formula we get
200=m*4
m=200/4
m=50kg
Therefore the mass of the car is 50 kilograms
2007-02-05 08:45:32 · answer #2 · answered by harsha 1 · 0⤊ 0⤋