Answer:
Explanation:
From the question we are told that:
Distance
Where
Generally the equation for meters will you traverse to reach your vacation destination is mathematically given by
Power = (work done) / (time to do the work)
Power = (2000 J) / (5 sec)
<em>Power = 400 watts</em>
Hooke's law states that for a helical spring the extension is directly proportional to the force applied provided the elastic limit is not exceeded.
Therefore; F= ke, where k is the spring constant, F is the force and e is the extension.
k = 2700 N/m and e = 3 cm or 0.03 M
therefore, F = 2700 × 0.03
= 81 N
Thus, the force required will be 81 N
The correct answer to your question is B. The heat gained by the cold water
Answer:
Total distance covered during the journey is 235 m
Solution:
As per the question:
Initial velocity, v = 0 m/s
Acceleration, a =
Time, t = 5 s
Now,
For this, we use eqn 2 of motion:
The final speed of car after t = 5 s is given by:
v' = v + at
v' = 0 + 2(5) = 10 m/s
Now, the car travels at constant speed of 10 m/s for t' = 20 s with a = 0:
d' = 200 m
Now, the car accelerates at a= - 5 until its final speed, v" = 0 m/s:
d" = 10 m
Total distance covered = d + d' + d" = 25 + 200 + 10 = 235 m