The velocity vs time graph for the motion of a car on a straight road is shown in the graph. Assume that the car starts at the origin 𝓍 = 0 at time t = 0.
The car's initial velocity is east.
2
2
Question 8
8.
Question 9
9.
The table shows the velocity of a student walking down the hallway between classes.
1. What is his acceleration between t = 10,0 s and t = 20,0 s? Answer: _______ m.s-2
2. What is his acceleration between t = 60,0 s and t = 61,0 s? Answer: _______ m.s-2
Question 10
10.
What quantity is the rate of change of velocity?
Question 11
11.
Question 12
12.
Question 13
13.
Which set of physical quantities consists only of scalar quantities?
Time, distance and speed
Velocity, speed and time
Displacement, velocity and acceleration
Acceleration, speed and distance
An object moving in a positive direction experiences an acceleration of +2,0 m.s-2. This means the object
is increasing its velocity by 2 m.s-1 every second
is decreasing its velocity by 2 m.s-1 every second
travels 2 m every second
is travelling at 2 m.s-1
If the acceleration of an object is zero, then that object cannot be moving
True
False
The motions of a car and a truck along a straight road are represented by the velocity-time graphs in the figure. The two vehicles are initially alongside each other at time t = 0. At time T, what is true of the distances traveled by the vehicles?
The truck will not have moved.
The car is travelling at a constant velocity
The truck will have travelled further than the car.
They will have travelled the same distance.
A bus is travelling south at 20 m.s-1 when the driver sees a child run in front of the bus. The bus driver applies the brakes and the bus stops in time. Which is the best description of the velocity and acceleration of the bus after the brakes are applied?
north
south
Velocity
Acceleration
Question 6
6.
Question 7
7.
Marco wants to buy the used sports car with the greatest acceleration.
Car A can go from 0 m.s-1 to 18,9m.s-1 in 4,00 s.
Car B can accelerate from 0 m.s-1 to 22,4 m.s-1 in 3,50 s.
Car C can go from 0 to 26,8 m.s-1 in 6,00 s.
Rank the three cars from greatest acceleration to least.
Car A
Car C
Car B
Which swimmer swam the furtherest?
A
B
C
They all swam the same distance
A bus travels a distance of 120 km with a speed of 40 km.h-1 and then another 60 km with a speed of 30 km.h-1. Calculate the average speed for the entire journey.
36 km.h-1
50 km.h-1
90 km.h-1
120 km.h-1
Which of the following is moving faster?
A scooter moving with a speed of 300 m per minute.
A car moving with a speed of 36 km per hour.
At 10 s is the car's position east or west from its starting point?
east
west
During which time interval(s) is the car speeding up? Select all that may apply.