Physics basics (1)
The term for something that only has a magnitude
What is a scalar?
This term refers to the measurement the length that something has travelled
What is distance?
The unit of mass in physics
What is the kilogram?
You walk 20 meters West and then 10 meters East. What is the total distance.
What is 30 m?
The unit of force in physics
What is the Newton?
The term for something in physics that has magnitude and direction
What is a vector?
This term is the change in position of an object
What is displacement?
The units for velocity in physics
What is m/s?
You walk 20 meters West and then 10 meters East. What is your displacement?
What is 10 meters WEST?
A value that shows the ration of the frictional force to the normal force.
Coefficient of friction
Name two things in physics that are scalars which we have discussed in class so far
What is distance, speed, or mass.
The term in physics describes an objects rate of change in position and its direction
What is velocity?
The units for acceleration in physics
What is m/s/s?
An object is dropped from rest. How fast is it going in 4 seconds?
What is 40 m/s?
The units that make up a Newton?
What is kg x m/s2?
This is a term that is used to describe the tendency for an object to stay at rest or stay in motion at constant velocity
What is inertia?
This term is the rate at which the velocity is changing
What is acceleration?
If an object traveled 5300 meters in 15 seconds, was its average velocity?
353 m/s
A cannonball is launched 50m/s at an angle of 15 degrees to the horizontal. What is its vertical velocity component?
12.9 m/s
A wood block with a mass of 3 kg slides on a horizontal table top. The coefficient of friction is 0.74. What is the frictional force acting on the block?
22.2 N
Name 3 things in physics that are vectors that we have discussed so far this year
What are displacement, velocity, acceleration, or force
This term refers to a projectile that is only under the influence of the force of gravity and air resistance
What is free fall?
Abe Lincoln threw his 2kg mug straight up into the air with an initial velocity of 24 m/s. How fast is it traveling, and in which direction, 6 seconds later?
6 m/s, downward
A cannonball is launched from the ground 50 m/s at 15 degrees to the horizontal. What is its total hang time?
2.6 seconds
There are six books in a stack, and each book weighs 5 N. The coefficient of friction between the books is 0.2. With what horizontal force must one push to start sliding the top five books off the bottom one?
5 N