WorksheetsP - 3.3 - Support Force
Total questions: 16
Worksheet time: 25mins
What is the difference between force and net force on an object?
Net force is the combination of all acting forces.
Force is a push or a pull.
Net force is a push or a pull.
Force is a push or a pull.
They are the both forces.
There is a difference between force and net force on an object.
What is the net force on a box that is being pulled to the right with a force of 40 N and pulled to the left with a force of 30 N?
Net force is 40 N to the right.
Net force is 10 N to the left.
Net force is 10 N to the right.
Net force is zero.
What name is given to the stretching force that occurs in a spring or rope being pulled?
support force
tension
vector sum of forces
stretching thingy force?
What two quantities are necessary to determine a vector quantity?
two quantities
vectors and velocity
size and magnetude
Magnitude and direction
How does a vector quantity differ from a scalar quantity?
Vector quantity needs both magnitude and direction for its description.
Scalar quantity is described by magnitude only, a number.
Scalar quantity needs both magnitude and direction for its description.
Vector quantity is described by magnitude only, a number.
They are different.
Give an example of a vector quantity.
time
temperature
force
speed
Give an example of a vector quantity.
time
temperature
velocity
volume
Give an example of a scalar quantity.
speed
force
velocity
How much tension is in a rope that holds up a 20 N bag of apples at rest?
0 N
10 N
20 N
40 N
What does Σ F = 0 mean?
It means something about sigmas.
It means that the vector sum of all the forces that act on an object in equilibrium equal zero.
It means that the vector sum of all the forces that act on an object in equilibrium equals at least 300 N.
What is the net force on an object at rest?
zero
10 N
40 N
200 N
When you do pull-ups and you hang at rest, how much of your weight is supported by each arm?
Each arm supports all of your weight.
Each arm supports half your weight.
What is the angle between a support force and the surface an object rests upon?
it varies usually
45 degrees
90 degrees
How does support force and the surface an object rests upon relate?
it varies usually
45 degrees
support force is perpendicular (normal) to the surface
What two forces compress a spring inside a weighing scale when you weigh yourself?
speed and velocity
Your downward push due to gravity
Your downward push due to gravity and the upward force of the floor
momentum and your acceleration
When you are at rest and supported by a pair of weighing scales, how does the sum of the scale readings compare with your weight?
The reading on the scale touching your dominant foot is more accurate than the reading on the scale touching your nondominant foot.
The sum of the readings will equal your weight when you are at rest.
The sum of the scale readings compare with your weight.
