PHYS203 Lab Midterm-Questions 2025/2026 with
100% Correct Solutions
What does the position vs time graph of a girl walking steadily away from the motion
sensor look like?
The line of the graph is a straight increasing line.
If a position vs time graph is a straight line, then what is the significance of its slope?
The straight line indicates a line with a slope of 0 and the velocity of the line is 0 m/s; the object
is not moving.
The velocity vs time graph is parallel to and below the time axis, what can you deduce
about the motion?
The motion of the object has a constant velocity and the object is moving in the negativity
direction without acceleration.
A velocity time graph shows a straight increasing line from 0 to 5 seconds and then a
straight constant line from 5 to 10 seconds where at 10 seconds the line touches the x-axis.
The object is moving with an increasing velocity in the positive direction from the time 0-5
seconds and from 5-10 seconds the object is moving at a constant velocity in the positive
direction. Lastly at 10 seconds the object has reached a velocity of 0m/s meaning it stopped
moving.
What is a vector quantity?
a quantity that has both magnitude and direction.
, What is a scalar quantity?
A quantity that has only magnitude.
What is the formula for the x components of a force?
Vx = |F|cos(theta)
What is the formula for the y components of a force?
Vy = |F|sin(theta)
What is the formula for the angle of a resultant force?
Theta = arctan (Ry/Rx)
What is the formula for the magnitude of a resultant force?
R = square root ((Rx)^2 + (Ry)^2)
What is the equilibrant force?
The force equal in magnitude but opposite in direction of the resultant.
If a net force acts on an object, what will happen to the object?
The object's velocity will increase leading to the object being accelerated in the direction of the
net force.
Can a body be in equilibrium when only one forces acts upon it?
No, because in order to be in equilibrium all the forces acting on that object must equal zero;
when only one force is acting upon the object the force acting on that object cannot equal zero.
100% Correct Solutions
What does the position vs time graph of a girl walking steadily away from the motion
sensor look like?
The line of the graph is a straight increasing line.
If a position vs time graph is a straight line, then what is the significance of its slope?
The straight line indicates a line with a slope of 0 and the velocity of the line is 0 m/s; the object
is not moving.
The velocity vs time graph is parallel to and below the time axis, what can you deduce
about the motion?
The motion of the object has a constant velocity and the object is moving in the negativity
direction without acceleration.
A velocity time graph shows a straight increasing line from 0 to 5 seconds and then a
straight constant line from 5 to 10 seconds where at 10 seconds the line touches the x-axis.
The object is moving with an increasing velocity in the positive direction from the time 0-5
seconds and from 5-10 seconds the object is moving at a constant velocity in the positive
direction. Lastly at 10 seconds the object has reached a velocity of 0m/s meaning it stopped
moving.
What is a vector quantity?
a quantity that has both magnitude and direction.
, What is a scalar quantity?
A quantity that has only magnitude.
What is the formula for the x components of a force?
Vx = |F|cos(theta)
What is the formula for the y components of a force?
Vy = |F|sin(theta)
What is the formula for the angle of a resultant force?
Theta = arctan (Ry/Rx)
What is the formula for the magnitude of a resultant force?
R = square root ((Rx)^2 + (Ry)^2)
What is the equilibrant force?
The force equal in magnitude but opposite in direction of the resultant.
If a net force acts on an object, what will happen to the object?
The object's velocity will increase leading to the object being accelerated in the direction of the
net force.
Can a body be in equilibrium when only one forces acts upon it?
No, because in order to be in equilibrium all the forces acting on that object must equal zero;
when only one force is acting upon the object the force acting on that object cannot equal zero.
