Force
Unbalanced forces _________________________ velocity.
What is change?
_______________________ is the change in velocity divided by the time it took for the change to occur.
What is Acceleration?
What is the average speed of a cheetah that sprints 80 m in 8s?
What is 10m/s?
______________________ is the force that opposes the sliding motion of two surfaces.
what is friction?
If you travel a distance of 144 meters in 12 second, what is your average speed?
What is 12 m/s?
A cricket accelerates from 4 m/s to 18 m/s in 9 seconds. What is the cricket’s average acceleration?
1.6 m/s^2
Forces on an object that are equal in size but opposite in direction are called __________________________
What are balanced forces?
Acceleration has an SI unit of ______________________
What is meters per seconds squared (m/s2)
Jane jogs a path that is 54 meters long due West of her home. It takes her 9 minutes to jog the path. What is her average velocity
What is 6 minutes?
When two surfaces are in contact, __________________________ forms, which causes friction to occur.
What is microweld?
A bullet is shot from a rifle at a speed of 5 m/s. How long will it take for the bullet to strike a target 45 meters away?
What is 9 seconds?
A car advertisement states that a certain car can accelerate from rest to 70 km/h in 7 seconds. Find the car’s average acceleration.
10m/s^2
Force has a SI unit of ___________________________ .
What is Newton?
In the acceleration equation, vi stands for ______________________ and vf stand for ______________________ .
What is initial velocity and final velocity?
What is the average speed of an object that travels 33 meters in 11 seconds?
What is 3 m/s?
If you push on an object and it does not move, what kind of friction are you dealing with? ______________________________
What is static friction?
If a car moves at a speed of 5 m/s. How far will the car travel in 4 seconds?
What is 20 meters?
A skateboarder traveling at 7.0 meters per second rolls to a stop at the top of a ramp in 3.0 seconds. What is the skateboarder’s acceleration?
-2.3m/s^2
When two forces are unbalanced, the net force is the ___________________ .
What is the difference?
If you are slowing down, your acceleration will be ___________________
What is negative?
Carly headed down Dickson road heading North. He ran for a total of 7 hours and covered 21 miles. What is his average velocity?
What is 3 m/s North?
If you push on a box and you are able to slide it across the floor, what kind of friction are you dealing with? ____________________
What is sliding friction?
If you pull out of your driveway in 9 seconds and reach a speed of 54 m/s. How fast did you accelerate?
What is 6 m/s2?
From rest, after traveling for 6.0 seconds, a runner reaches a speed of 10 m/s. What is the runner’s acceleration?
1.7m/s^2
______________________ is a push or a pull one object exerts on another
What is Force?
What is the formula for acceleration? ____________________
what is a=vf-vi/tf-ti?
A car is traveling at the speed of 10m/s at the top of a hill. Seven seconds later it reaches the bottom of the hill and is now moving at 38m/s. What is the rate of acceleration of the car?
What is 4 m/s2?
What is the formula for time? ______________________
What is t=d/v
You are traveling along at 48 meters per second when you notice a stop light ahead. You decelerate to 0 m/s in 8 seconds. What is your acceleration?
What is 6 m/s2?
Falling objects drop with an average acceleration of 9.8 m/s2 . If an object falls from a tall building, how long will it take before it reaches a speed of 49 m/s?
5 seconds