Someone pulls a 750g candy box along the ground, horizontally.
If the coefficient of friction is...
Someone pulls a 750g candy box along the ground, horizontally.
If the coefficient of friction is 0.22, what force is necessary to
pull to an acceleration of 2.5 m/s^2?
1. A student pulls horizontally on a 12 kg box, which then moves
horizontally with an acceleration of 0.2 m/s2. If the
student uses a force of 15 N, what is the coefficient of kinetic
friction of the floor?
2. A 30 kg block slides down a 20° ramp with an acceleration of
1.2 m/s2. What is the coefficient of kinetic friction
between the block and the ramp?
3. For a given velocity of projection in a projectile motion,
the...
A 1.9 kg block slides along a horizontal surface with a
coefficient of kinetic friction μk = 0.30. The block has a speed v
= 1.4 m/s when it strikes a massless spring head-on.
If the spring has force constant k = 120 N/m, how far is the
spring compressed?
What minimum value of the coefficient of static friction, μS,
will assure that the spring remains compressed at the maximum
compressed position?
If μS is less than this, what is...
A guy pushes a box of mass 10kg along an inclined plane of 15.0.
The coefficient of kinetic friction is 0.2. The man gives a force
of 50N on the box along the inclined plane and the box goes through
a displacement of 2m. Find:
a) the net work done on the box
b) if the guy takes 2 minutes to move the box 2m, then find his
power
If the coefficient of kinetic friction is 0.2, what friction of
the total mechanical energy is lost due to frictional forces?
Run#
Mass of hanger + weights (M)
mass of glider +flag (m)
velocity of glider (v)
d (m)
potential energy lost (Mgd) (J)
Kinetic energy gained 1/2 (m+M)v2
% change (ME)
1
0.05
0.2118
0.88
0.235
0.1152675
0.10136896
12.05763984
2
0.07
0.2118
1.01
0.235
0.1613745
0.14373209
10.93258848
3
0.09
0.2118
1.12
0.235
0.2074815
0.18928896
8.768270906
4
0.11
0.2118
1.2...
A mass of 8 kg rests on a floor with a coefficient of static
friction of 0.88 and coefficient kinetic friction of 0.33. One
force is applied vertically downward of 28 Newtons and another
force is applied at an angle of 26 degrees below the horizontal.
Calculate what the magnitude this force needs to be in order to
begin to move the mass. If that force is removed and another force
is applied at an angle of 26 degrees above...
A mass of 9 kg rests on a floor with a coefficient of static
friction of 0.92 and coefficient kinetic friction of 0.37. One
force is applied vertically downward of 22 Newtons and another
force is applied at an angle of 26 degrees below the horizontal.
Calculate what the magnitude this force needs to be in order to
begin to move the mass. If that force is removed and another force
is applied at an angle of 26 degrees above...
A mass of 6 kg is placed on an incline with a coefficient of
static friction of 1.80 and coefficient of kinetic friction of
1.28. No additional forces are acting on it and it is raised slowly
from a small angle and it begins to slide at some angle. If 10
degrees is added to this angle, and the mass started from rest from
a vertical height of 28 meters, how much longer would it take to
travel down the...
An object is launched horizontally with a speed of 78.8 m/s. It
lands on the ground 19.6 m from where it was launched. How high
above the ground was it launched from? Report your answer in SI
units, rounded to two decimal places.
A wagon is rolling forward on level ground. Friction is
negligible. The person sitting in the wagon is holding a rock. The
total mass of the wagon, rider, and rock is 98.9 kg. The mass of
the rock is 0.291 kg. Initially the wagon is rolling forward at a
speed of 0.490 m/s. Then the person throws the rock with a speed of
16.1 m/s. Both speeds are relative to the ground. Find the speed of
the wagon after the...