question archive A ball starts rolling up a ramp at 10 m / s
A ball starts rolling up a ramp at 10 m / s
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A ball starts rolling up a ramp at 10 m / s . Later, it rolls down the ramp at 15 m / s and is 15 m down from the origin.
1) what is the acceleration of the ball?
2) how much time has elapsed during the ball's movement?
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a)acceleration
=4.167m/s2
b)time
=1.2s
Step-by-step explanation
a)
Acceleration,a;
A=[v2-u2]/2s
Where
V=final velocity
U=initial velocity
S=distance travelled
Therefore
A=[152-102]/[2*15]
=225-100 /30
=4.167m/s2
b)
t=[v-u]/a
v=final velocity
u=initial velocity
a=acceleration
therefore
t=[15-10]/4.167
=1.2s
