Homework Statement
A(n) 43 kg block is pushed along the ceiling
with a constant applied force of 560 N that
acts at an angle of 67◦ with the horizontal,
as in the figure. The block accelerates to the
right at 4.5 m/s2.
The acceleration of gravity is 9.8 m/s2 .
What is the magnitude of the...
Homework Statement
Four blocks are on a frictionless horizontal
surface. The blocks are connected by massless
strings with tensions Ta, Tb, and Tc.
Calculate the tension Tc.
Answer in units of N.
Homework Equations
F = ma
Fn = mg
The Attempt at a Solution
Tc1 = 25N
Tc2 = 35N
Homework Statement
A 11 kg block slides down a frictionless slope
which is at angle θ = 24◦. Starting from rest,
the time to slide down is t = 1.85 s.
The acceleration of gravity is 9.8 m/s2 .
(look at image)
What total distance s did the block slide?
Answer in units of m.
Homework...
Tension problem!
Homework Statement
Consider a force F = 887 N pulling 3 blocks
of masses m1 = 9 kg, m2 = 16.9 kg, and
m3 = 26.1 kg along a frictionless horizontal
surface.
The tension of the strings are T1 and T2 (see
sketch).
The equation of motion of m2 is given by
1. T1 − T2 = m1 a...
acceleration question!
Homework Statement
A 4.9 kg object hangs at one end of a rope that
is attached to a support on a railroad boxcar.
When the car accelerates to the right, the
rope makes an angle of 25◦ with the vertical
The acceleration of gravity is 9.8 m/s2 .
look at the picture...
Homework Statement
A person weighing 0.6 kN rides in an elevator
that has a downward acceleration of 3 m/s2.
The acceleration of gravity is 9.8 m/s2 .
What is the magnitude of the force of the
elevator floor on the person?
Answer in units of kN.
Homework Equations
F = ma
The...
Newton's forces on a box!
Homework Statement
Two 45 N forces and a 90 N force act on a hanging box as shown in the picture below.
Will the box experience acceleration?
1. Yes; upward.
2. No; it is balanced.
3. Unable to determine without the angle.
4. Yes; downward.
Homework...