Question

A factory worker exerts a 100 N horizontal pushing force on a 70.0 kg box that is initially at rest on the floor. The coefficient of static friction is 0.2 and the coefficient of kinetic friction is 0.1. The force of friction acting on the box is equal to:

Answer #1

As block is initially at rest. So , in order to move it, applied force should be greater than limiting static friction force. Limiting value of static friction force here is given by

= 0.2×70×9.8

= 137.2 N

Since applied force is less, box will remain at rest. Static friction force of 100 N will act to balance the applied force (so that net force in horizontal direction is zero) and to keep the box at rest.

f = 100 N, in direction opposite to applied force.

A woman exerts a horizontal force of 107 N on a box with a mass
of 40.2 kg.
(a)
If the box doesn't move, what's the magnitude of the static
friction force (in N)?
N
(b)
What is the minimum possible value of the coefficient of static
friction between the box and the floor? (Assume the box remains
stationary.)

Mary applies a force of 75 N to push a box with an acceleration
of 0.43 m/s2. When she increases the pushing force to 81 N, the
box's acceleration changes to 0.63 m/s2. There is a constant
friction force present between the floor and the box. (a) What is
the mass of the box? kg (b) What is the coefficient of kinetic
friction between the floor and the box?
(a) What is the mass of the box?
_________kg
(b) What...

A 10kg box is being pushed with a horizontal force of 40N. The
coefficient of static friction is 0.7 and for kinetic friction is
0.5. What is the magnitude of the friction force acting on the
box?

18.
A 34.5 kg box initially at rest is pushed 5.75 m along a rough,
horizontal floor with a constant applied horizontal force of 150 N.
If the coefficient of friction between box and floor is 0.300, find
the following.
(a) the work done by the applied force
___J
(b) the increase in internal energy in the box-floor system due to
friction
___J
(c) the work done by the normal force
___J
(d) the work done by the gravitational force...

A box with mass of 5 kg is pushed with a force of 15 N on a
rough horizontal floor. Find the friction force (assume that the
static friction coefficient µs=0.4 ).
Please Solve As soon as
Solve quickly I get you thumbs up directly
Thank's
Abdul-Rahim Taysir

Marsha is pushing down and to the right on a 21-kg box at an
angle of 30? below horizontal. The box slides at constant velocity
across a carpet whose coefficient of kinetic friction with the box
is 0.70.
Determine the magnitude of the force exerted by Marsha on the
box.
Determine the magnitude of the normal force exerted by the
surface on the box.
Determine the magnitude of the friction force exerted by the
surface on the box.

A factory worker moves a 21.0 kg crate a distance of 4.80 m
along a level floor at constant velocity by pushing horizontally on
it. The coefficient of kinetic friction between the crate and the
floor is 0.300.
What magnitude of force must the worker apply? (N)
How much work is done on the crate by the worker's push? (J)
How much work is done on the crate by friction? (J)
How much work is done by the normal force?...

A factory worker pushes a 29.8 kg crate a distance of 5.0 m
along a level floor at constant velocity by pushing downward at an
angle of 30 ∘ below the horizontal. The coefficient of kinetic
friction between the crate and floor is 0.26.
1.What magnitude of force must the worker apply to move the
crate at constant velocity?
2.How much work is done on the crate by this force when the
crate is pushed a distance of 5.0 m...

John was pushing a 6.8 kg box horizontally with a force of 7.0 N
at a steady speed of 0.2 m/s. Then he decided to tie a rope to the
box to make it possible to pull it forward. Now the box is moving
at 0.6 m/s as John is pulling on it at the angle of 30.3o up of
horizontal. What is the magnitude of the force of John's pull?

A 12.3 kg box sits on a horizontal table. A string with tension
31.1 N pulls on the box to the right, but static friction between
the box and the table prevents the box from moving. The coefficient
of static friction between the box and the table is 0.43. What is
the magnitude of the static friction force on the
box?

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 4 minutes ago

asked 10 minutes ago

asked 13 minutes ago

asked 16 minutes ago

asked 19 minutes ago

asked 22 minutes ago

asked 27 minutes ago

asked 29 minutes ago

asked 39 minutes ago

asked 40 minutes ago

asked 44 minutes ago