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Mechanics paper 42

An object travels with the speed of u m/s and has a constant acceleration of a m/s^2
If it travel first 80 meters in the 5 sec and travels first 160 m in 8 sec what is u and a
Reply 1
Avatar for ThomH97
ThomH97
21
You need u and a, and are given equations involving s and t. Can you think of an equation that relates those together?
Reply 2
Avatar for Ramish
Ramish
OP
4
S=ut+1/2 a t^2
Original post by ThomH97
You need u and a, and are given equations involving s and t. Can you think of an equation that relates those together?
Reply 3
Avatar for ThomH97
ThomH97
21
Original post by Ramish
S=ut+1/2 a t^2


Yup, so chuck everything into that to get two equations relating u and a.
Reply 4
Avatar for Ramish
Ramish
OP
4
80=5u+1/2 (a)(25)
160=8u+1/2 (a)(64)
U mean like this?
Original post by ThomH97
Yup, so chuck everything into that to get two equations relating u and a.
Reply 5
Avatar for ThomH97
ThomH97
21
Original post by Ramish
80=5u+1/2 (a)(25)
160=8u+1/2 (a)(64)
U mean like this?

Yup. Keep going :smile:
Reply 6
Avatar for Ramish
Ramish
OP
4
Thank you man i did exactly the same thing in my paper i was just verifying.

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