an object with mass of 100kg changes its velocity from 90km/h to 72km/h in 20 seconds
Calculate the force acting on the object
Answers
Answered by
2
Answer:
90 N
Explanation:
v=u+at
90=72+a*20
a=0.9
F=ma=100*0.9=90N
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Answered by
2
Answer:
900 N in the direction opposite to the direction of motion.
Explanation:
force = mass*acceleration
a = v-u/t
= 72-90/2
= -9 m/s²
negative sign here indicates the acceleration of the object is decreasing.
F = m*a
= 100*-9
= -900 N
= 900 N in the direction opposite to the direction of motion.
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