Forces
What is the metric unit for Force
Newton
A force that resists motion is
friction
What is the amount of material in an object
mass
Net force is the ___________ of all forces acting on an object
sum
Give two examples of forces
-wind, air resistance, gravity, push or pull
friction force that resists the motion between two surfaces that are not moving
static friction
what is the metric unit for weight?
Newton
Two friends play tug of war. One friend pulls to the right 45 N and the other pulls 65 N to the left. What is the Net force on the system?
20 N to the left
F=mxa force = mass x acceleration
Give an example of sliding friction
answers will vary
Convert 78 pounds into Newtons
78 x 4.448= 346.944 N
If the force of Gravity is 17 N and the Normal force is 17N what is the net force?
0 N
What is the opposing force to gravity?
Which is greater: sliding friction or static friction
static friction
List all the units that are for mass below:
kilogram, Newton, pound, gram
pound and gram
What is the Net force?
Gravity: 10 N
Normal Force: 10 N
Applied Force: 1,500 N
Friction Force: 700 N
Net Force = 800 N
Draw a free body diagram where all of the forces are in equilibrium or balanced
answers will vary
compression force keeps nail in place and friction works opposite the direction the nail is being pulled out
A Christmas tree is 10 kg on earth. What is the tree's weight on earth and the moon if gravity on the moon is 1.6 m/s2.
earth: 98 N
moon: 16 N
If a system is balanced, what is the Net force on that system?
0 N