Linear Motion
6.67 X 10 ^-11 Nm^2/kg^2
What is the Universal Gravitational Constant
What is the magnitude of the vertical acceleration on Earth?
9.8
The equation for work
What is W= F*X * cos Theta
307 L
What is the room number for physics lab?
Number of physics teachers in Francis Lewis High School?
what is 5?
This is the acceleration of a block sliding down a frictionless incline of angle θ theta.
What is a=gsinθ?
This is the tension in a rope when a 5 kg mass hangs at rest from it.
What is T=mg=49 N?
This is the work done by a constant force of 10 N acting on a particle that moves 4 m in the direction of the force.
What is 40 J?
This is the velocity of a 2 kg cart after a perfectly inelastic collision with a 1 kg cart moving at 6 m/s, if the 2 kg cart was initially at rest.
What is 2 m/s?
The speed equation for a satellite at an altitude h
What is the sqrt of G MEarth / (R Earth + H)?
A construction worker accidentally drops a brick from a high scaffold. What is the velocity of the brick after 4.0s?
-39 m/s
A construction worker accidentally drops a brick from a high scaffold. How far does the brick fall during this time?
-78 m
A tennis ball is thrown straight up with an intial speed of 22.5 m/s. It is caught at the same distance above the ground
25.8 m
If a student runs 6 meters East then 8 meters West what is the students displacement? Assuming East is +
-2 meters
This is the tension in each rope when a 20 kg mass hangs symmetrically from two ropes that each make a 30° angle with the vertical.
T=mg/2cos30∘≈113 N= approx 113 N?
A ball of mass 2.0 kg is thrown vertically upward from the top of a building. The ball’s velocity v is given as a function of time t by the equation v(t) = R - St, where R = 5 m/s and S = 10 m/s2. The positive direction is upward.
What is the ball’s acceleration at time t = 1 s?
-10 m/s2
An object moves along a straight line with a velocity vv given as a function of time tt by the equation v(t)=αt2+βt+γv(t)=αt2+βt+γ.
Which of the following expressions represents α(t)α(t), the acceleration of the object as a function of time tt.
2αt+β
You decide to flip a coin to determine whether to do your physics or English homework first. The coin is flipped straight up. If the coin reaches a high point of 0.25 m above where you released it, what was its initial speed?
2.2 m/s
You decide to flip a coin to determine whether to do your physics or English homework first. The coin is flipped straight up. What is the velocity of the coin at the at the top of its trajectory?
V = 0 m/s
A tennis ball is thrown straight up with an initial speed of 22.5 m/s. It is caught at the same distance above the ground. How long does the ball remain in the air?
2.3 seconds
The inventor of US Patent 5 567 747
Who is Mr. Rizopoulos?
A student is testing the kinematic equations for uniformly accelerated motion by measuring the time it takes for light-weight plastic balls to fall to the floor from a height of 3 m in the lab. The student predicts the time to fall using g as 9.80 m/s2 but finds the measured time to be 35% greater. Which of the following is the most likely cause of the large percent error?
A. The acceleration of the plastic balls is not uniform
B. The acceleration due to gravity is 70% less than 9.80 m/s2 at this location.
A. The acceleration of the plastic ball is not uniform.
An object is moving along the x-axis, with position x given as a function of time t defined by the equation x(t)=2t^3−3t^2−8t−3 . Which of the following equations indicates how to determine the object's velocity v as a function of t ?
v(t)=ddt(2t^3−3t^2−8t−3)
The velocity of a particle moving along the x-axis is given as a function of time by the expression v(t) = 3.0t^2 – 2.0t + 4.0 , where v is in meters per second and t is in seconds. What is the acceleration of the particle at t = 2.0 s?
10m/s^2
Astronauts travel to another planet and wish to determine an accurate value for the acceleration due to gravity. They drop an object from the edge of a very tall cliff and with a motion sensor collect the data shown. If air resistance is negligible, the magnitude of the acceleration of the projectile is most nearly
Times Distance Fallen
0.1 0.26
0.4 4.2
0.7 12.9
1.0 26.4
53.8 m/s^2