Question

a 500 lb box slides at 20 ft/s along a horizontal surface (uk=0.3). A 300 lb force is then applied at an angle 30 degrees relative to the surface, for 2 seconds. Determine the final speed of the box?

Answer #1

a 500 lb box slides at 20 ft/s along a horizontal surface
(uk=0.3). A 300 lb force is then applied at an angle 30 degrees
relative to the surface, for 2 seconds. Determine the final speed
of the box?

A box, initially at rest, is pulled by a rope as it slides along
a horizontal (level) carpeted floor in the positive direction;
there is friction. The mass of the box is 8 kg and the tension in
the rope has a magnitude of 40 N. After 4 seconds of pulling, the
box has a speed of 12 m/s.
1. While the box is being pulled:
a. what is the magnitude of acceleration of the box? Answer:
_________
b. what...

A package of 20.0 lb is dragged by friction 15.0 feet
up along a moving surface of conveyor belt inclined at angle of
36.9 degrees above horizontal
if the package's speed is a constant 1.0 in/s, how much work is
done on the package by:
a) by friction
b)gravity, and
c) The normal force of the conveyor belt?

A 2.0 kg puck slides along a frictionless surface with a speed
of 5.0 m/s and collides with a stationary 3.0 kg puck. After the
collision, the 2.0 kg puck moves at an angle of 35◦ relative to its
direction of motion before the collision. The 3.0 kg puck moves at
an angle of -20◦ relative to the initial direction of motion of the
first puck.
You must clearly answer all parts to this question.
a) Draw a diagram to...

There is a 690 kg box being pushed up an inclined surface by a
horizontal force of 5500 N. As it is being pushed, its speed goes
from 1.5 m/s to 2.6 m/s. How much energy is transformed into
thermal energy as it is pushed 3.0 meters up the incline? The angle
of inclination is 30 degrees.

A 4.0-kg block initially at rest is pulled to the right along a
horizontal surface by a constant horizontal force of 12 N.
Find the speed of the block after it has moved 3.0 m if the
surfaces in contact have a coefficient of kinetic friction of 0.17
_____.
a. 1.8 m/s
b. 3.5 m/s
c. 2.8 m/s
d. 5.3 m/s
Suppose the force is applied at an angle. At what angle should
the force be applied to achieve the...

A 2.80 kg box is moving to the right with speed 8.50 m/s on a
horizontal, frictionless surface. At t= 0 a horizontal
force is applied to the box. The force is directed to the left and
has magnitudeF(t)=( 6.00 N/s2 )t^2
a. What distance does the box move from its position at
t=0 before its speed is reduced to zero?
b. If the force continues to be applied, what is the velocity of
the box at 3.00 s ?

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 36.5 kg box initially at rest is pushed 4.25 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
J...

2. A 5.0 kg box is moving on a
horizontal surface at 0.50 m/s with a rope applying a constant
tension on the box of 100 N at an angle of 10° above the horizontal
(above the direction of motion). The coefficient of kinetic
friction between the box and the surface is 0.25. What is the speed
of the box after it has moved 25 cm?

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