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INEEDTOPASSS
31.10.2020 •
Physics
A tram of 800kg takes 6 seconds to stop after travelling at a constant speed of 18m/s. Calculate the deceleration and the force needed to be applied by the brakes to stop the tram.
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Ответ:
-3m/s²
2400N
Explanation:
Given parameters:
Mass of tram = 800kg
Time taken = 6s
Constant speed = 18m/s
Unknown:
deceleration = ?
force on brake = ?
Solution:
Deceleration is the opposite of acceleration. This is the rate of change of velocity with time;
Deceleration =![\frac{V - U}{t}](/tpl/images/0858/2495/a31a2.png)
V is the final velocity = 0m/s
U is the initial velocity = 18m/s
t is the time taken
Deceleration =
= -3m/s²
Force needed to to stop the tram;
Force = mass x acceleration
Insert parameters and solve;
Force = 800 x 3 = 2400N
Ответ:
answer:
5568
xplanation: