Unit 1:
Kinematics
Kinematics
What are the two components that make up a vector (velocity, acceleration, etc).
Magnitude and Direction
What is Newton's 1st Law? Give an example.
An object in motion will stay in motion, an object at rest will stay at rest.
What direction does centripetal acceleration and centripetal force go in for an object in an orbital path.
The two arrows point towards the center of orbit.
What is the impulse of car crashing into a wall with 100 N of force for 3 seconds?
300 Ns
What is the difference between distance and displacement?
Distance is the total amount traveled, displacement is the shortest distance from point a to point b.
A person went from 2m to 18m in 4s. What is their velocity?
4 m/s
What is the weight of 20 kg object?
Hint: ag = 9.8 m/s/s
196 N
What directions do the field lines of positive and negative charges go in.
Positive Charges = Outward
Negative Charges = Inward
Which vehicle has the most momentum?
40 kg Car: 20 m/s
20 kg Bike: 45 m/s
50 kg Truck: 1.5 m/s
The bike as it has 90 kg*m/s of momentum.
In a distance-time graph, if the slope is flat, what does that tell us about the velocity?
The velocity is zero or the object is at rest.
A person went from rest to 36 m/s in 4.5s. What is their acceleration?
8 m/s/s
Two people on ice, one person is 20 kg and the other is 25 kg. If the 20 kg person pushes and experiences a 100 N of force, how much force does the 25 kg person experience?
100 N (Newton's 3rd Law)
What are all 3 of Kepler's Laws.
1. All objects move in an elliptical path.
2. The closer the object is to the star, the faster it moves. The further it is, the slower it moves.
3. The further away a planet is from the star, the longer the period. The closer it is, the shorter the period.
A car going 2 m/s experiences an impulse of 80 N*s. What is its mass?
40 kg
In a distance-time graph, if the slope is going down, what does that tell us about the object?
The object has a negative velocity.
A person goes from 10 meters to 150 meters in 3 seconds. What is their velocity?
46.67 m/s
A 10 kg person pushes a 15 kg box and the box moves with an acceleration of 20 m/s/s. What is the force?
300 N
Two charged particles experience a force of 10 N. What would be the new electrical force if the charge of one particle increased by 4 times.
40 N
A 15 kg car going 100 m/s crashes into a 15 kg parked truck. After the collision, they stick together, what is their velocity?
50 m/s
In a velocity-time graph, if the slope is going up, what does that tell us about the object?
The object is accelerating or the velocity is increasing.
A person is driving at 250 feet/min for 1 hour. How many feet did he drive? (1 hour = 60 mins)
15,000 feet
A 20 kg person pushes a 10 kg box with an applied force of 150 N and the box moves with an acceleration of 10 m/s/s. What is the frictional force?
Hint: Net Force = Applied Force - Frictional Force
50 N
Two planets experience a force of 20 N. What would be the new gravitational force if the mass of one planet increases by 2 times, and the separation distance decreases by 2 times.
160 N
A 15 kg car going 100 m/s crashes into a 20 kg truck going -5 m/s. After the collision, they stick together, what is their velocity?
40 m/s
An objects goes 10m North, 20m West, 5m South, and 20 m East. What is their distance and their displacement? Include direction.
Distance: 55m
Displacement: 5m North