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Mechanics: Motion & Acceleration Flashcards | StudBud
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Mechanics: Motion & Acceleration
Mechanics: Motion & Acceleration
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15 Question quiz over motion & acceleration
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Answers
1
Engineers use the laws of physics to design roller coasters
engineers don't design roller coasters
False
roller coaster packs come from Ikea
True
2
How would you calculate total distance traveled from this graph?
3+5+8
you can't with this graph
area under the graph
(1/2 x 3)+(1/2 x 3)+(3/4 x 5)+(1 1/2 x 3)+(1 x 8)+(1/2 x 8)
3
In this graph what is happening in the first 4 seconds?
increasing acceleration
constant acceleration
speed going up
constant speed
4
how would you calculate the distance traveled in the first 5 seconds?
(4 x 8) + 8
4 x 8
1/2(4 x 8) + (6 x 8)
1/2(4 x 8) + 8
5
T = 1/2 G/r
What happens to T if r increases?
T increases
it depends what G is
T decreases
T is greater than
6
how would you calculate the distance traveled in the last 6 seconds?
6 x 8
4 x 10
10 x 8
1/2 10 x 8
7
Define Motion
Change in an objects position relative to a reference point
A person running
Something moving
Change in an speed position relative to a reference
8
Define acceleration
meters/second/second
The initial velocity minus the final velocity
The rate of change of an object's speed
change in distance / change in time
9
Which one of newton's laws talks about acceleration
3
2
1
10
Which is the best example of horizontal motion?
knocking a chair over
a boat travelling on a lake
a bike going down hill
siting down
11
Velocity is.....
going faster
motion
speed in a specific direction
motion with direction
12
The harder you throw a ball the greater the initial acceleration
not always
False
True
it depends on the trajectory
13
v = Δd/Δt
what happens to speed when delta time is increased?
speed accelerates
speed increases
constant speed
speed decreases
14
Delta (Δ) is calculated by...
initial minus final
d/t
v/t
final minus initial
15
a = Δd/Δt
What happens to acceleration when delta time increases?
acceleration decreases
no change in acceleration
it depends if t is in SI units
acceleration increases
16
What is the formula for acceleration
a=vi-vf/Δt
a=Δv/Δt
S=d/t
a=v/t
17
v = Δd/Δt
what happens to speed when delta time is decreased?
speed decreases
speed does not change
speed increases
speed is constant
18
In this graph what is happening at section "D"?
acceleration
time is increasing
distance away from home is increasing
constant speed forward
19
Acceleration is the measure of the change in
speed
mass
density
velocity
20
On a distance - time graph a positive gradient (e.g. "C" in this graph) shows....
acceleration
an increase in velocity
constant motion
an increase in speed
