PLEEEASE HELLPPP!!!! In the experimental setup shown, a car has one end of a string attached to it, and the other end is attache
d to a fixed number of metal discs. The car
moves along the table and two probes sense the motion of the car. The probes send information to a computer that displays the acceleration and
velocity of the experiment. When looking at these results, which quantity stays constant during the trials?
(1 point)
O acceleration
O velocity
O mass
O force
moves along the table and two probes sense the motion of the car. The probes send information to a computer that displays the acceleration and
velocity of the experiment. When looking at these results, which quantity stays constant during the trials?
(1 point)
O acceleration
O velocity
O mass
O force
1 answer:
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Answer:
69.74 N
Explanation:
We are given that
Weight of sled=49 N
Coefficient of kinetic friction
Weight of person=585 N
Total weight==mg=49+585=634 N
We know that
Force needed to pull the sled across the snow at constant speed,F=Kinetic friction
Where N= Normal=mg
Hence, the force is needed to pull the sled across the snow at constant speed=69.74 N