What is the difference between a vector quantity and a scalar quantity?
A scalar has a magnitude and direction and a vector has only a magnitude
A vector has a magnitude and direction and a scalar has only a magnitude
A scalar has a direction and a vector has a magnitude
None of the above
Q.2.
What two measurements are necessary for calculating speed?
Mass and time
Temperature and mass
Mass and distance
Distance and time
Q.3.
A falling skydiver which has reached terminal velocity is considered to be in a state of free fall.
True
False
Q.4.
An object accelerates atm/s^Assuming the object starts from rest, how much time does it need to accelerate to a speed ofm/s?
4 s
8 s
16 s
1/16 s
Q.5.
A merry go round starts from rest, and reaches an angular speed of 2 radians/second in 3 seconds. What is its angular acceleration, and through what angle does it sweep in the 3 second time interval?
α = 3/2 rad/s2, θ=27/4 rad
α = 2/3 rad/s2, θ=3 rad
α = 2/3 rad/s2, θ=6 rad
α = 6 rad/s2, θ=27 rad
Q.6.
In the absence of air resistance, objects fall at constant
speed
velocity
acceleration
all of the above
Q.7.
A flywheel starts from rest, and has an angular acceleration of 4 rad/sWhat will be its angular speed when it has made one revolution?
5.01 rad/s
50.27 rad/s
2.83 rad/s
7.09 rad/s
Q.8.
A hummingbird averages a speed of aboutkm/hour (Cool facts: They visit up toflowers per day, and reach maximum speed, while diving, up tokm/hour!). Ruby-throated hummingbirds take a non-stop trip across Gulf of Mexico in which they fly forhours straight! How far is the trip across the Gulf of Mexico at their average speed?
810 km
2.5 km
3.6 km
360 km
Q.9.
You run from your house to a friend's house that is 3 km away. You then walk home. The distance you traveled is 6 km. What is your displacement?
6 km
0 km
Q.10.
The slope of a velocity vs time graph is known as:
acceleration
velocity
average speed
displacement
Q.11.
Which of the following is a unit for acceleration?
km/s
m/s2
mi/hr
ft
Q.12.
Calculate the speed of a sprinter who ranmeters inseconds.
10m/s
10km/s
10m/hr
10km/hr
Q.13.
The height of an individual step on a staircase is closest to
2.0 m
2.0 cm
20 cm
20 mm
Q.14.
A person already walking at 1 m/s takes 2 seconds to reach a top speed of 5 m/s. What is their acceleration?
1 m/s^2
2 m/s^2
4 m/s^2
6 m/s^2
Q.15.
Which of the following statements about speed and velocity is correct?
Velocity only describes an object’s rate of motion.
Speed describes how an object is changing its velocity.
Speed and velocity both describe how an object is speeding up.
Only velocity includes the direction an object is traveling.
Q.16.
A car travelsmeters due north inseconds. Then the car turns around and travelsmeters due south. What is the magnitude and direction of the car's resultant displacement
40 metres, South
50 metres, South
50 metres, North
40 metres, North
Q.17.
Velocity is different from speed because..
Velocity is distance/time. Speed is displacement/time.
Velocity is speed in a certain direction and can be positive or negative.
Speed is velocity in a certain direction. Both can only be positive.
Velocity is how much speed changes over time.
Q.18.
What is the slope of a velocity-time graph an indication of?
Distance travelled
Instantaneous speed
Acceleration
Q.19.
A bus travelling eastwards atm s-1 takesto come to halt, its deceleration is equal to
6 m/s eastward
-6m/s eastward
6m/s2 eastward
-6 m/s2 eastward
Q.20.
A car covers a distance of 5 km in 5 mins, its average speed is equal to
1km/h
25km/h
60km/h
None
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