Average Speed
Speed and Velocity
Distance-Time Graphs
First Law of Motion
Newtons 2nd and 3rd Law of Motion
100
What is the formula used to find average speed?
Average Speed- Distance/ Time
100
What is the formula for average velocity?
Displacement/ time
100
Draw a graph for the following scenario.
Max decides to go play xbox at his friends house. He walks at the same pace all the way there. He stays there for about two hours and walks back home for dinner.
Constant increase, at rest, constant decrease
100
What is an unbalanced force and balanced force?
Unbalanced force- when the forces exerted on an object are unequal
Balanced force- when forces exerted on an object are equal
100
What Unit do we Measure Force in?
Newtons
200
If a car travels 150 kilometers in 2 hours, what is its average speed?
75 km/hr
200
How are speed and velocity different?
Velocity includes the direction
200
What part of the graph is showing a constant increase in speed? (At least two answers)
A and C
200
When calculating net force, what should you do when the arrows are in the opposite direction and when they are in the same direction?
When in the opposite direction you subtract. When in the same direction you add.
200
What is the formula for acceleration?
Acceleration = Force / Mass
300
A student runs 100 meters in 12.5 seconds. What is the student's speed?
8 m/s
300
What is the difference between displacement and distance?
Distance is the entire length of an objects' path. Displacement is the difference between the initial position and final position.
Displacement includes direction
300
What does the graph tell us about the movement of the car from 6-8 seconds?
Constant decline/ Constant decrease
300
What is the first law of motion?
An object at rest will remain at rest unless acted upon by an unbalanced force. An object in motion will remain in motion unless acted upon by an unbalanced force.
300
Based on the picture, which sports ball would have the least acceleration?
The bowling ball
400
What is the average speed at 1 hr?
15 km/hr
400
Louis was traveling south with his family from Dallas to San Antonio. Louis used his phone to check how long it would to get there. His phone read that it would take about 4 hours to travel the 270 miles. What would the velocity of Louis's car have to be in order to cover that distance in that amount of time?
67.5 mi/hr south
400
A car travels at a constant speed of 60 km/h for 1 hour, then stops for 30 minutes, and finally continues at a speed of 80 km/h for another 2 hours.
- Draw a distance-time graph that represents the car's journey over a total time of 3.5 hours.
- Label the axes clearly, and indicate the key points where the car stops and changes speed.
see drawings
400
What is the net force of the object above?
50N to the left
0N and won't go up or down
400
A truck accelerates at 5 m/s². Find the truck's mass if the driver applies a force of 425 N.
M= F/A
85 kg
500
What is the average speed of the graph?
10 km/hr
500
John decided to ride his bike from the park (point A) back to his house (point B). Then he decided to take the long way around and pass through the schoolyard (point C) to get back to the park (point A). What is his distance and displacement?
Distance- 12m
Displacement- 0m
500
Label the four different types of charts
1. Constant speed
2. Increasing speed
3. Decreasing speed
4. At rest
500
If a box is being pushed with 5N on the left and someone begins to push with 5N on the right side of the box, what will happen to the motion of the box?
The box will continue to move at a constant speed.
500
PART A:
A rocket pushes exhaust 10, 000 N. Without any other forces acting on the rocket, how much force does the rocket go forward?
PART B:
Which of Newton's Laws describe the scenario above?
PART A:
10,000N
PART B:
Newton's 3rd Law