2 years ago

A ball rolls on a carpet. The ball experiences friction as it rolls. How will friction affect

Physics

1 answer:

mote1985 [20]2 years ago

6 0

Answer:

A- The ball experiences an unbalanced force and will slow down.

Explanation:

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A girl pulls her younger brother on a sled along a flat sidewalk (the total mass of the sled is 30kg). A frictional force of 50N

harkovskaia [24]

Answer:

6.13 s

219 N

Explanation:

Newton's law in the x direction:

∑F = ma

150 cos 30° N − 50 N = (30 kg) a

a = 2.66 m/s²

Δx = v₀ t + ½ at²

(50 m) = (0 m/s) t + ½ (2.66 m/s²) t²

t = 6.13 s

Newton's law in the y direction:

∑F = ma

Fn + 150 sin 30° N − (30 kg) (9.8 m/s²) = 0

Fn = 219 N

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3 years ago

A cylinder 0.170 m in diameter rotates in a lathe at 530 rpm . what is the tangential speed of the surface of the cylinder?

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Diameter = 0.170 meter
Circumference = 0.170 π meters

530 rpm = 530 circumferences / minute

   = (530 x 0.170 π meters) / minute

   =    283.06 meter.minute

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2 years ago

Sharks also swim in waters off the coast of Nova Scotia. When gray seals and harbor seals see sharks nearby, they must swim away

Vlada [557]

No. The seals are responding to a stimulus.

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3 years ago

Can work done=mass*acceleration*displacement(work=m*a*s)

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no, work is = force * distance or displacement

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3 years ago

HELP ME 20 POINTS!!!Assume that the average volume of an adult human body is one-tenth

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Answer:

,Assume that the average volume of an adult human body is one-tenth

cubic meter (0.10 m) and that there are two billion (2.0 x 109)

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2 years ago

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