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A bike ride (mass=84.2 kg, with bike) accelerates from rest to 3.15 m/s over 7.83 m, while exerting a 98.4 N forward force. How much force?
 
pushes back against her due to friction, etc?

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Beverley Smith
Beverley SmithLv2
18 Apr 2019

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Related textbook solutions

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

Related questions

1. A man drags a table 3.55 m across the floor, exerting a constantforce of 48.0 N, directed 32.0° above the horizontal.

(a) Find the work done by the applied force.


(b) How much work is done by friction? Assume the table's velocityis constant.



2. You ski straight down a 41.6° slope, starting from rest andtraveling a distance of 10.5 m along the slope. Find your finalvelocity, assuming negligible air resistance and friction.


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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

A stockroom worker pushes a box with a mass of 11.2 kg on a horizontal surface with a constant speed of 3.5 m/s. The coefficient of kinetic friction between the box and the surface is 0.20. 

(a) What horizontal force must the worker apply to maintain the motion?

(b) If the force calculated in part(a) is removed, how far does the box slide before coming to rest?

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