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Edexcel A-Level Physics
2. Mechanics
2.2. Kinematics
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Cards (138)
Displacement is a vector quantity measured in
meters
What is acceleration measured in?
m/s²
Velocity is a scalar quantity.
False
Instantaneous velocity describes motion over time periods.
False
What is the acceleration of a car that increases its velocity from 0 m/s to 10 m/s in 5 seconds?
2 m/s²
A car travels 500 m north and then 300 m south. What is the total distance covered?
800 m
The cyclist's velocity is 0.5 km/min east.
True
Instantaneous velocity describes motion at a specific
moment
.
True
A car covers 100 meters in 10 seconds. What is its average velocity?
10 m/s
The equation for velocity-time is
v
=
v =
v
=
u
+
u +
u
+
a
t
at
a
t
A car accelerates from 0 m/s to 20 m/s in 5 seconds. What is its displacement?
50 m
The displacement-time equation relates displacement, initial velocity, acceleration, and time.
True
What is the acceleration of a car that goes from 0 m/s to 20 m/s in 5 seconds?
4 m/s²
What does the velocity-time equation relate?
v, u, a, t
How many variables do you need to know to apply the equations of motion?
3
The acceleration of the car in the third example is
4 m/s²
.
True
The displacement-time equation relates displacement, initial velocity, acceleration, and
time
.
The final velocity of the car in the sixth example is
20 m/s
In free fall, the acceleration due to gravity is approximately
9.8 m/s²
.
The velocity-displacement equation in free fall is
v
2
=
v^{2} =
v
2
=
u
2
+
u^{2} +
u
2
+
2
g
s
2gs
2
g
s
.
True
What is the displacement of the ball after 2 seconds in the free fall example?
-19.6 m
What replaces acceleration in the equations of motion for free fall?
Acceleration due to gravity
What is the velocity-displacement equation for free fall?
v
2
=
v^{2} =
v
2
=
u
2
+
u^{2} +
u
2
+
2
g
s
2gs
2
g
s
The acceleration due to gravity is approximately 9.8
m/s²
.
True
Match the quantity with its description:
Scalar ↔️ Magnitude only
Vector ↔️ Magnitude and direction
Scalar quantities have both magnitude and direction.
False
A cyclist rides 10 km east in 20 minutes. What is their speed in km/min?
0.5 km/min
How is instantaneous velocity calculated?
Derivative of displacement
What is the definition of instantaneous velocity?
Velocity at a specific moment
The formula for average velocity is \bar{v} = \frac{\Delta x}{
\Delta t
}</latex>
True
At 5 seconds, a ball's velocity is
d
x
d
t
=
\frac{dx}{dt} =
d
t
d
x
=
15
15
15
m/s. What is its instantaneous velocity?
15 m/s
The displacement-time equation relates
s
s
s
,
u
u
u
,
a
a
a
, and t
The displacement-time equation is
s
=
s =
s
=
u
t
+
ut +
u
t
+
1
2
a
t
2
\frac{1}{2}at^{2}
2
1
a
t
2
. For the car in the example, the displacement is 50 meters.
To apply the equations of motion, you need to know at least 3 of the 5 variables: s, u, v, a, t.
True
What is kinematics the study of?
Motion without considering forces
A car travels 100 meters north in 10 seconds. Its average velocity is
10
m/s north.
A car travels 500 m north and 300 m south. Its displacement is
200
m north.
Instantaneous velocity is determined by the derivative of displacement with respect to
time
.
Scalar quantities have magnitude
only
.
Vector quantities have both
magnitude
and direction.
True
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