The frictional force required is 9000 N
Explanation:
In order to keep the car in the turn in circular motion without sliding, the frictional force must provide the centripetal force necessary for the circular motion.
Therefore, we can write:
where the term on the left is the frictional force while the term on the right is the centripetal force, and where:
m is the mass of the car
v is its speed
r is the radius of the curve
For the car in this turn, we have
m = 1000 kg
v = 30 m/s
(since the diameter is 0.20 km, the radius is half that value)
And substituting, we find
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"Compared with its original speed after release, its speed when it returns to the same position is about <span>b. the same as, since gravity has now acted up on. </span>
Answer:3 is sublimation
Explanation:
It goes from solid straight to gas
Answer: A
Explanation: The amount of work done by Joe is equal to the amount of work done by Bob, because both have the same weight, same bicycle, cycling the same road and started the same time but the average power exerted by Joe is greater than that of Bob because Joe climbed a mountain while Bob passed a lower grade road.
