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10 Nov 2019

A worker applies a force of 103 Newtons in thedirection show in the diagram below to drag a 100 g crate at aconstant velocity for 20 meters along a rough, horizontalfloor.

a. What is frictional force exerted on the crate by thefloor?

b. How much work does the worker do in moving the crate throughthe 20 meters?

c. How much work is done by the normal force on the crate?Explain.

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Jean Keeling
Jean KeelingLv2
25 Jan 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

A crate is dragged 4m along a rough floor with a constantvelocityby a worker applying a force of 450 N to a rope at anangle of 30degrees to the horizontal.

How much work does each of the forces do? (normal,gravity,worker, friction)
What is the total work done on the crate?

hi,

i have 5 questions i need the complete solutions with theirfinalresults. is there anyone could help me, i wouldappreciatethat.



1)A worker pushes a sled with a force of 40 N over
a level distance of 6.0 m. If a frictional force of 24 N actsonthe
wheelbarrow in a direction opposite to that of the worker, whatnetwork is
done on the wheelbarrow?



2)
A horizontal force of 200 N is applied to a
55-kg cart across a 10-m level surface. If the cart acceleratesat2.0 m/s2,
then what is the work done by the force of friction as it actstoretard the
motion of the cart?



3)
If both mass and velocity of a ball are tripled,
the kinetic energy is increased by a factor of:

a) 9, b) 12, c) 3, d) 6



4)
A 1 200-kg automobile moving at 25 m/s has the
brakes applied with a deceleration of 8.0 m/s2. How far does thecartravel
before it stops?



5)
Samantha pushes a 50-N crate up a ramp 25.0 m in
length and inclined at 10° with the horizontal. Whatpotentialenergy
change does the crate experience?



thank you in advance

hi,
i have 5 questions i need the complete solutions with theirfinalresults. is there anyone could help me, i wouldappreciatethat.

1)A worker pushes a sled with a force of 40 N over a leveldistanceof 6.0 m. If a frictional force of 24 N acts on thewheelbarrow ina direction opposite to that of the worker, what network is doneon the wheelbarrow?

2) A horizontal force of 200 N is applied to a 55-kg cart acrossa10-m level surface. If the cart accelerates at 2.0 m/s2, thenwhatis the work done by the force of friction as it acts to retardthemotion of the cart?

3) If both mass and velocity of a ball are tripled, thekineticenergy is increased by a factor of:
a) 9, b) 12, c) 3, d) 6

4) A 1 200-kg automobile moving at 25 m/s has the brakesappliedwith a deceleration of 8.0 m/s2. How far does the car travelbeforeit stops?

5) Samantha pushes a 50-N crate up a ramp 25.0 m in lengthandinclined at 10° with the horizontal. What potential energychangedoes the crate experience?

thank you in advance

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