Your friend is on rollerblades holding a pendulum. You gently push her forward and let go. You observe that the pendulum first s
1 answer:
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Answer:
The acceleration of the cart is 283.54g
Explanation:
It is given that,
Initial speed of the car, u = 35 km/h = 9.72 m/s
Finally, it stops, v = 0
Diameter of the dime, d = 1.7 cm
Let a is the acceleration of the car. Using third equation of motion to find it as :
So, the acceleration of the car is and it is decelerating.
Since,
So,
So, the acceleration of the cart is 283.54g. Hence, this is the required solution.
Answer:
amount of work done is
Explanation:
Formula for work done by force field
where
r(t) is parametrization of line
as it is straight line so
thus,
r(t) = (1-t)(-1,1) + t(3,-3)
= (-1+t,1-t) + (3t - 3t)
= (-1+t +3t, 1-t-3t)
r(t) = (4t -1, 1- 4t)
r'(t) = (4,-4)
putting value in above integral