20 Practice Questions for Year 11 Physics Module 1: Kinematics

Question 6

Two trains pass each other on the tracks. The first train is travelling East at 120 km/hr and the second train is travelling at 100km/hr in the same direction. A passenger throws a ball at 20km/hr towards the back of the second train. What is the velocity of the ball relative to the ground?

Calculate the relative velocity of two objects moving along the same line using vector analysis

Question 7

What is the acceleration of a freely falling object if there is no air resistance? If there is air resistance, how does this affect the previous statement?

Use mathematical modelling and graphs, selected from a range of technologies, to analyse and derive relationships between time, distance, displacement, speed, velocity and acceleration in rectilinear motion (ACSPH061)

Question 8

A ball is thrown straight up into the air and it feels no air resistance. How can this ball have an acceleration when it stops moving at the highest point?

Use mathematical modelling and graphs, selected from a range of technologies, to analyse and derive relationships between time, distance, displacement, speed, velocity and acceleration in rectilinear motion (ACSPH061)

Question 9

You throw a piece of playdough straight up towards the ceiling, which is 4.50 m above the point where the playdough leaves your hand. The initial speed of the putty when it leaves your hand is 8.20 ms-1. How much time does it take for the playdough to reach the ceiling?

Use mathematical modelling and graphs, selected from a range of technologies, to analyse and derive relationships between time, distance, displacement, speed, velocity and acceleration in rectilinear motion (ACSPH061)

Question 10

The travelator in an airport terminal moves at 1.5 ms-1 and is 35.0m long. If someone steps on at one end and walks 1.8 ms-1 relative to the travelator, how much time does it take for her to reach the end of the travelator if she a) walks in the opposite direction? b) in the same direction?

Calculate the relative velocity of two objects moving along the same line using vector analysis

Motion on a Plane

Question 11

A plane is travelling North at 140km/hr, and it encounters a side wind travelling East at 50km/hr. What would the resulting velocity of the plane be?

Analyse the relative motion of objects in two dimensions in a variety of situations (ACSPH060, ACSPH132)

Question 12

A boat traveling East at 5.0 m/s encounters a current traveling North at 3.0 m/s. If the width of the river is 100m wide, what distance downstream will the boat reach the shore?

Analyse the relative motion of objects in two dimensions in a variety of situations (ACSPH060, ACSPH132)

Question 13

Why is it easier for an aeroplane to take off into the wind rather than against it?

Describe and analyse algebraically, graphically and with vector diagrams, the ways in which the motion of objects changes, including:

• velocity
• displacement

(ACSPH060, ACSPH061)

Question 14

Someone throws a ball at a wall and this collision occurs over 1s. The initial and final velocity is 5ms-1. The ball hits all wall at an angle of 60 degrees to the wall and it deflects back at the same angle. Calculate the change in velocity.

Describe and analyse algebraically, graphically and with vector diagrams, the ways in which the motion of objects changes, including:

• velocity
• displacement

(ACSPH060, ACSPH061)

Question 15

A boy throws a ball into a very high arc and the decides to run across to catch it. Which has the greater displacement, the boy or the ball? Explain your reasoning.

Describe and analyse algebraically, graphically and with vector diagrams, the ways in which the motion of objects changes, including:

• velocity
• displacement

(ACSPH060, ACSPH061)

Question 16

A canoe has a velocity of 0.50 ms-1 northwest relative to the Earth. The canoe is on a river with currents flowing 0.70 ms-1 west relative to the Earth. Find the velocity of the canoe relative to the river.

Analyse the relative motion of objects in two dimensions in a variety of situations (ACSPH060, ACSPH132)

Question 17

If a flea can jump to a heigh of half a meter, what is its initial speed as it leaves the ground and how long is it in the air?

Describe and analyse algebraically, graphically and with vector diagrams, the ways in which the motion of objects changes, including:

• velocity
• displacement

(ACSPH060, ACSPH061)

Question 18

Person A and Person B are standing underneath a tree. After an argument occurs, they walk away in different directions, Person A walks 50.0m in the direction 70 degrees west of north. Person B walks 25m in a direction 60 degrees south of west. They then stop and turn to face each other. What is the distance between them and what direction should person A walk to go directly towards person B?

Represent the distance and displacement of objects moving on a horizontal plane (ACSPH060)

Question 19

What are the length restrictions required for three vectors to have a vector sum of zero? Explain.

Represent the distance and displacement of objects moving on a horizontal plane (ACSPH060)

Question 20

A plane leaves an airport and flies 220km at 70 degrees west of north, then it changes direction to fly 180km at 50 degrees south of west, and then makes an immediate emergency landing in a field. When the airport sends out a rescue crew, in which direction and how far should the crew fly to go directly to the plane?

Represent the distance and displacement of objects moving on a horizontal plane (ACSPH060)