To calculate speed, what two things do you need to know?
Distance and time
100
What is a normal force? Give an example
The force opposite of gravity, like a table, chair, and the floor.
100
What does not affect friction?
Surface Area!!
100
What simple machine is missing?
Inclined Plane
Pulley
Wedge
Lever
Wheel and Axle
The screw
200
What are all forces are measured in ?
Newton's
200
How do you calculate speed?
Distance divided by time
200
What is an applied force?
A force that causes motion to occur!
200
What are the units when we calculate work?
Joule or Newton meter! (J or Nm)
200
What is the rate at which objects accelerate to Earth due to gravity?
9.81 m/s2
300
When all forces acting on an object are equal (balanced) the object must be??
Not in motion - Not moving - At rest
300
In our class, what is the units that we used for speed?
m/s (meter per second)
300
The amount of gravitational force in an object is the object's??
Weight!
300
How do you calculate work?
Distance times force!
300
How do we calculate work?
Force times distance
400
When all the forces acting on an object are not equal (not balanced) the object must be??
In motion - Moving
400
A mini car is travelling a distance of 100m for 10 seconds. What is the object's speed?
10 m/s
400
Is friction a force? Yes or No?
Yes!
400
If an incline plane has an effort distance of 15m and the effort force was 3N, how much work was done?
45 Joules (45 Nm)
400
What is Newton's 1st law of motion?
The law of inertia.
An object at rest stays at rest unless acted upon by an unbalanced force, an object in motion stays in motion unless acted upon by an unbalanced force.
500
All forces can be measured with a ?
Spring Scale
500
A car's speed is 45 m.p.h. and wants to make it home for dinner, and home is 45 miles away. How long will it take him to get home?
One hour
500
What two things affect friction??
Surface type (wax paper vs sandpaper) and Weight of the object
500
Force exerted and distance object is moving must be in the same.....?
Direction
500
Tell me the missing word:
Speed is distance over time, meter's per second an example so fine...
Velocity is more cuz there's ______________ implied!!!