Formula for work: work = force X distance
work = 10N X 5m
work = 50 Nm
Answer:
It Is 25J greater.
Explanation:
Applying the Energy conservation theorem, we have:
The Work done by the ice worker is given by:
The angle is 180 degrees because the force exerted by the worker is opposite to the motion.
If the rope was not there, the external work is 0, so:
The kinetic energy is 25J greater without the rope.
Answer:
Time taken for the car to travel a distance of 4.50 m = 1.40 seconds
Explanation:
velocity of toy car = 3.21 m/s
distance travelled by toy car = 4.50 m
Time = ?
Therefore, the time taken for the car to travel a distance of 4.50 m = 1.40 seconds
Explanation:
The magnitude of centripetal acceleration is:
a = v² / r
The velocity is:
v = d/t
v = 2 × 2π (5 m) / 60 s
v = 1.05 m/s
a = (1.05 m/s)² / (5 m)
a = 0.219 m/s²
The direction is towards the center. So at point A, the centripetal acceleration is 0.219 m/s² downward, and at point B, the centripetal acceleration is 0.219 m/s² upward.