Kinematics
You are given the equation yf= 10-4.9t2. What is the corresponding velocity as a function of time equation for this object?
What is:
vf = -9.8 t?
A pair of figure skaters with masses of 20 kg and 40 kg are stationary on frictionless ice. The 20 kg skater pushes with 15N of force on the 40 kg ice skater. What force does the 40 kg ice skater exert, and what is the acceleration?
15 N away from the 20 kg skater, with an acceleration of 0.375 m/s/s
Describe what a flat line on a position vs. time graph mean
The object is not moving (it have a constant position)
A car accelerates from 12 m/s to 37 m/s over a distance of 200 m, determine the car's acceleration.
What is 3.065 m/s/s?
An airplane starts from rest and reaches a speed of 71 m/s in 45s before taking off. How far does th airplane travel in that time?
What is 1,597.5 m?
Inertia is described as:
A 3kg block is placed on a frictionless horizontal surface and is attached to a spring with a spring constant of k = 150 N/m. The block is initially at rest at the equilibrium position. The block is then pulled back, stretching the spring by 10 cm and is released from rest. What is the maximum speed of the block?
What is 0.7 m/s?
Determine what the slope of a velocity vs. time graph tells us
What is acceleration?
A snail is moving in a straight line. Its initial position is at x = -3 m and it is moving away from the origin and slowing down. Determine the relative signs for the initial position, initial velocity and acceleration
What is:
Negative, Negative, Positive
A race car driver needs to cover 500 m in 5.5 seconds on the straightaway. He knows coming out of the turn, that he can only be going 50 m/s. What does his acceleration need to be in order to cover the distance?
What is 14.8 m/s/s?
Two objects are experiencing a gravitational force of 300 N between them. If the distance between them is tripled, determine the new force of attraction between them
What is 33.33 N
If a certain amount of kinetic energy in a system is lost to heat and sound, what can we say is happening?
Negative work is being done
What does the area under the curve of an acceleration vs. time graph tell us
What is velocity?
A 5 kg box is being pushed across a surface. The box accelerates at a rate of 2 m/s/s. If there is 5 N of friction force opposing the motion, what is the magnitude of the force being applied to the box?
What is 15 N
A position vs. time graph has a non-curved negative slope. What can we say about the acceleration of the object?
That is has no acceleration, since the slope of the line is constant.
State Hooke's Law
The force exerted by a spring in directly proportional to its displacement
What is a Joule or a kg m2/s2
What does the slope of a Force vs. Displacement graph tell us?
What is the spring constant?
A spring with a spring constant of 0.7 N/m is stretched 150 cm, determine the magnitude of the force
What is 1.05 N
Which error is associated with precision?
Random Error
The force of gravity always acts at what part of an object's mass?
The center of the object's mass
What are the requirements for Work to occur?
What does a non-constant slope on a velocity vs. time graph tell us?
There is some constant acceleration acting on the object
List the four field forces