motion Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

displacement

A

dis travelled in given direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

velocity

A

rate of change of displacement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

accelerate

A

rate of change of velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

how can the terminal velocity of an object be determined using light gates

A
  • set up light gates vertically and measures the distance between them
  • connect them to data logger and then release an object from rest above them, measuring the time it takes for the object to travel between the two gates
  • using the time and known distance calc velocity
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

how can light gates be used to investigate conservation of linear momentum

A
  • place two carts on leaner air track with repelling magnets so that they do not stick together
  • attach card to top of each cart so that they break the beams of the light gates when they pass
  • keep one cart stationary and push the other towards it measuring its velocity before collision
  • then measure the velocity of both carts after the collision and calculate the momentum before and after
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

experiment to determine g

A
  • an electromagnet holds steel ball suspended a measured distance above a surface, then start the timer when the electromagnet is deactivated and stop it when the surface is hit
  • as ball initially resting u = 0
  • the distance and time are known so use s = ut + 1/2at^2
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

ball projected of castle how does horizontal velocity change from launch until it hits the ground

A

horizontal velocity remains the same as there is no acceleration in the horizontal direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

in projectile motion what is the vertical acceleration

A

the vertical acceleration is equal to gravitational field strength downwards

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

when thinking about stopping thinking and braking diet what is the area under a velocity time graph represent

A

total distance travelled

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

why is braking distance proportional to v^2

A

all vehicles ke is dissipated by brakes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

how does terminal velocity happen to object falling through fluid

A
  • velocity increases do does drag
  • as weight remains constant the net force will decrease until reaches 0
  • as a proportional to f, as force decreases so does acceleration
  • at point where drag = weight and hence net force = 0 the object is no longer accelerating
How well did you know this?
1
Not at all
2
3
4
5
Perfectly