1. A 250 puck is sliding across a smooth ice surface (u = 0.019) and slows down from 25.120m/s to 24.003 m/s within 73.7 m. Calculate:a) the net force acting on the puck during the acceleration.b) the time this force acted on the puck.2. A block of mass 35 kg is on a flat floor with a static friction coefficient of 0.36 and a kineticfriction coefficient of 0.29. A person attenmpts to slide the box from rest in a forward direction.Find the maximum frictional force experienced and the acceleration of the box once it ismoving if:a) the person pushes horizontally with 120 N.b) the person pushes at an angle with a 25 N vertical component directed down and a 200 Nhorizontal component of the push directed forward.c) the person pulls with 120 N on a rope up angled 30° up from the horizontal.3. A 15 kg komatik sled is attached by a light cord to another 10 kg komatik sled. Thesetandem sleds are accelerated North by a dog team that apply a 175 N force to the lightersled. The lighter sled is on ice so it has essentially no friction but the heavier sled is on roughsnow (u = 0.170) so it has some friction. Find:a) the friction on the heavy sled.b) the acceleration of the system (both sleds are moving forward together).c) the magnitude of the tension in the cord connecting the two sleds.This is an artisticrepresentationD Focus目ates)

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1. A 250 puck is sliding across a smooth ice surface (u = 0.019) and slows down from 25.120 m/s to 24.003 m/s within 73.7 m. Calculate: a) the net force acting on the puck during the acceleration. b) the time this force acted on the puck.

1. A 250 puck is sliding across a smooth ice surface (u = 0.019) and slows down from 25.120 m/s to 24.003 m/s within 73.7 m. Calculate: a) the net force acting on the puck during the acceleration. b) the time this force acted on the puck.

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!

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1. A 250 puck is sliding across a smooth ice surface (u = 0.019) and slows down from 25.120
m/s to 24.003 m/s within 73.7 m. Calculate:
a) the net force acting on the puck during the acceleration.
b) the time this force acted on the puck.
2. A block of mass 35 kg is on a flat floor with a static friction coefficient of 0.36 and a kinetic
friction coefficient of 0.29. A person attenmpts to slide the box from rest in a forward direction.
Find the maximum frictional force experienced and the acceleration of the box once it is
moving if:
a) the person pushes horizontally with 120 N.
b) the person pushes at an angle with a 25 N vertical component directed down and a 200 N
horizontal component of the push directed forward.
c) the person pulls with 120 N on a rope up angled 30° up from the horizontal.
3. A 15 kg komatik sled is attached by a light cord to another 10 kg komatik sled. These
tandem sleds are accelerated North by a dog team that apply a 175 N force to the lighter
sled. The lighter sled is on ice so it has essentially no friction but the heavier sled is on rough
snow (u = 0.170) so it has some friction. Find:
a) the friction on the heavy sled.
b) the acceleration of the system (both sleds are moving forward together).
c) the magnitude of the tension in the cord connecting the two sleds.
This is an artistic
representation
D Focus
目
ates)

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