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stiv31 [10]
3 years ago
6

Suppose a 48-N sled is resting on packed snow. The coefficient of kinetic friction is 0.10. If a person weighing 660 N sits on t

he sled, what force is needed to pull the sled across the snow at constant speed?
Physics
1 answer:
Annette [7]3 years ago
8 0

Assume the snow is uniform, and horizontal.

Given:

coefficient of kinetic friction = 0.10 = muK

weight of sled = 48 N

weight of rider = 660 N

normal force on of sled with rider = 48+660 N = 708 N = N

Force required to maintain a uniform speed

= coefficient of kinetic friction * normal force

= muK * N

= 0.10 * 708 N

=70.8 N


Note: it takes more than 70.8 N to start the sled in motion, because static friction is in general greater than kinetic friction.


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Answer:

Time constant of RC circuit is 0.105 seconds.

Explanation:

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\tau=0.105\ s

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Answer:

The latent heat of vaporization of water is 2.4 kJ/g

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