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cyberhev
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cyberhev said:Homework Statement
Hi all, the question for revision is; A car of mass 600kg traveling at 45m/s comes to rest in 12m when the brakes are applied. What is the average force exerted by the brakes?
Homework Equations
Force = mass x acceleration V^2=u^2 +2as
The Attempt at a Solution
I know I need to work out the acceleration but am having trouble correctly transposing that equation I think its this v^2-u^2 divided by s =2a, its what to do with the 2 to get a on its own, does it then become 1/2 s on the other side?
means "(1/2)s" or 1/(2s).1/2 s
Acceleration is the rate of change of an object's velocity over time. It is measured in units of distance per time squared, such as meters per second squared (m/s^2).
Acceleration can be calculated by dividing the change in velocity by the change in time. The formula for acceleration is a = (vf - vi) / t, where a is acceleration, vf is final velocity, vi is initial velocity, and t is time.
Brake force is the amount of force applied by a vehicle's brakes to slow down or stop its motion. It is typically measured in units of newtons (N) or pounds (lbs).
Brake force can be calculated by multiplying the coefficient of friction between the vehicle's tires and the road surface by the vehicle's weight. The formula for brake force is Fb = μ * W, where Fb is brake force, μ is coefficient of friction, and W is weight.
Acceleration and brake force are inversely related. This means that as acceleration increases, brake force decreases, and vice versa. This is because acceleration is the change in velocity, while brake force is the force needed to slow down or stop the vehicle's motion.