Find the net force for each

1
Find the net force for each
2
Find Ften2 and weight
Ften60N
Ften2___N
40
W_____N
Find Ften if mass of light is 8kg
Ften___N
80
Ften2___N
W_____N
3

• . The same type of traffic light is hung in two
  different ways as follows. Explain which ropes
  have greater tension and why.

4

• An applied force of 50 N is used to accelerate an
  object to the right across a frictional surface.
  The object encounters 10 N of friction. Use the
  diagram to determine the normal force, the net
  force, the mass, and the acceleration of the
  object. (Neglect air resistance.)

5

• In the diagrams above, free-body diagrams showing
  the forces acting upon a 100-kg skydiver are
  shown. For each case, use the diagrams to
  determine the net force and acceleration of the
  skydiver at each instant in time. Then use the
  pop-up menus to view the answers.

6
Force anyone?
7
A cart of mass 10 kg is sliding down a
frictionless ramp as shown below. Find the
acceleration of the cart down the ramp and the
magnitude of the normal force acting on the cart.
8
As an example consider the situation depicted in
the diagram at the right. The free-body diagram
shows the forces acting upon a 100-kg crate which
is sliding down an inclined plane. The plane is
inclined at an angle of 30 degrees. The
coefficient of friction between the crate and the
incline is 0.3. Determine the net force and
acceleration of the crate.
9
Force Problems

• A worker drags a crate across a factory floor by
  pulling on a rope tied to the crate. The worker
  exerts a force of T450 N on the rope, which is
  inclined at angle of 38.0 deg. angle to the
  floor. The floor exerts a horizontal resistive
  (i.e., "backwards") force of 125 N. Find the
  acceleration is the box weigh 50 kg.

10

• A T-1200 engine can propel a snowmobile with a
  certain force. When the T-1200 engine is
  installed in my snowmobile, it can accelerate (on
  frictionless ice) from 0 to 10 m/s in 5 seconds.
  When the T-1200 engine is installed in Jen's
  snowmobile, it accelerates from 0 to 10 m/s in 10
  seconds. Find the net force.

11
Ceiling
60O
Rope 2
Wall
Rope 1

• A stage light is suspended above the stage by two
  ropes, as drawn below.
• The stage light weighs 200 N. Find the tension in
  each rope

12

• A 42 kg toboggan, including its load, is pulled
  across a horizontal surface with snow by the 120N
  tension force of a rope directed 37 degrees above
  the horizontal. The coefficient of friction is
  0.2. What time is required to increase the
  toboggans speed from 0 to 4m/s.