In the figure, a 3.7 kg block slides along a track from one level to a higher level after passing through an intermediate valley
1 answer:
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Answer:b
Explanation:
Given
mass of first cart
mass of second cart
velocity of first cart
conserving momentum
Initial kinetic Energy
Final Kinetic Energy
Ratio of initial Kinetic Energy to the Final Kinetic Energy
Answer:
25 m/s
Explanation:
First of all, we can find the acceleration the object by using Newton's second law of motion:
where
F = 20.0 N is the net force applied on the object
m = 4.0 kg is the mass of the object
a is its acceleration
Solving for a, we find
Now we know that the motion of the object is a uniformly accelerated motion, so we can find its final velocity by using the following suvat equation:
where
v is the final velocity
u = 0 is the initial velocity
is the acceleration
t = 5 s is the time
By substituting,