Download Nat 5 Physics Homework

Nat 5 Physics Homework
Dynamics and Space
Vectors
For the following questions we are assessing your SKETCHING skills, use of
TRIGONOMETRY and interpretation of maps.
1/
Place the following into a table with two headings “Vector” and “Scalar”.
Acceleration, distance, displacement, time, energy, force, temperature, speed, velocity
2/
A plane is flying at 200 ms-1 due North. A strong wind of 50 ms-1 is blowing in an Easterly
direction. Draw this as a scale diagram and then use trigonometry to calculate the plane’s
velocity across the ground. Remember to include a bearing.
3/
Use google maps http://maps.google.co.uk/ or a map of your own to find
approximately;
a/ the distance you walk/cycle/drive to school
b/ the displacement of the school from your house
Acceleration
For the following questions we are assessing the LAYOUT of your work, and correct use
of UNITS.
1/ Use the following information and the formula a
acceleration:
= (v-u)/t to calculate the
a/ v = 4.5 ms-1
u = 2.5 ms-1
t = 0.5 s
a=?
b/ v = 600 ms-1
u = 120 ms-1
t = 12 s
a=?
2/ Use the following information and the formula v
velocity of the object:
= u + at to calculate the final
a/ u = 16 ms-1
a = 9.8 ms-2
t = 2.4 s
v=?
b/ u = 0 ms-1
a = 0.2 ms-2
t = 6 minutes
v=?
3/ A bullet is fired from the barrel of a gun. It starts at rest (v=0 ms-1) and accelerates to a
speed of 800 ms-1 inside the barrel and it takes 0.004 seconds doing so. Calculate the
acceleration of the bullet.
Show all your working in the appropriate format, and don’t forget units at the end!
4/ Using information given in the graph on the next HW exercise, calculate the acceleration
of Jarvis the Bee between. Remember, show all your working!!
a/ A and B
b/ C and D
c/ D and E
d/ E and F
Graphs
For the following exercise we are assessing your GRAPH skills.
1/
a/ Interpret the “story” of the following graph. The first line has been done for you:
Jarvis starts at rest and accelerates to 10ms-1 in 4 seconds……
b/ Using information from the graph calculate the following:
i/ the distance travelled between B and C iv) the distance travelled between D and F
iii) Between which stages is the magnitude of the acceleration greatest. Explain your answer
carefully.
2/ Sketch a graph, of appropriate size and with detail, of the following event which takes 1 ½
minutes. Use your skills sheet for reference.
“A train pulls out a station and gradually accelerates up to 10ms -1. It takes 20 seconds to
do this and then travels at this speed for 40 seconds before accelerating up to 40 ms -1 in a time of
30 seconds.”
Newtons Law’s Historical
For the following questions we are assessing your RESEARCH SKILLS. Refer to your
skills sheet for help.
1/
In your own words, write down Newton’s 3 laws of motion.
2/
Write down the name of the book and the year in which these laws were first
published. Use the internet to find out. Remember to name your source!
3/
Choose a famous scientist from the list below. Make a business card for them
advertising their main contribution to science. Name any sources you used for your
research (books, websites etc)
Johannes Kepler, Isaac Newton, Nicolaus Copernicus, Galileo Galilei, Edmond Halley,
Tycho Brahe, Giordano Bruno, Thomas Harriot, Francis Bacon, Caroline Herschel Ismaël
Boulliau, Mary Somerville, Christiaan Huygens, Robert Hooke
Newtons Law’s Numerical
For the following questions we are assessing the LAYOUT of your work and your ability
to PROBLEM SOLVING and REARRANGING EQUATIONS.
1/
A car with a mass of 1200kg accelerates at 2 ms-1.
a/ Use Newton’s second law to calculate the unbalanced force required to do this.
b/ At one point during this acceleration the frictional force pushing against the car is
2000N. What must the engine force be at this moment? Show your working clearly.
2/
An astronaut is on her way to Mars. She weighs herself on planet Earth and finds
that she is 539 N.
a/ Calculate her mass.
b/ Write down her weight and mass during the journey.
c/ Calculate her weight on Mars (assume she has lost no mass during the journey)
3/ Willy Fog is conducting an experiment to find the gravitational field strength of planet
Earth. He completes his experiment at different locations around the world and finds that
his results vary slightly. His results can be found below:
Location
First Reading
Nkg-1
London
9.81
North Pole 9.82
Indonesia 9.77
Equador
9.80
Kenya
9.78
South Pole 9.83
Second Reading
Nkg-1
9.80
9.83
9.78
9.74
9.78
9.85
Third Reading Average Reading
Nkg-1
Nkg-1
9.79
9.85
9.76
9.71
9.78
9.84
a/ Make a new table with two headings “Location” and “Average Reading
Nkg-1”. Complete the table by calculating the average readings.
b/ Suggest a reason for the differences in his results
c/ How may he have gone about completing this experiment? Give a brief description of
how you think he may have acquired these results.
Newtons Law’s In Practice
For the following questions we are assessing PRESENTATION skills.
Use the internet to research the “Bloodhound” high velocity car. Use your knowledge of
Newtons Laws make a sketch of the car and include all the forces acting on the car. You
must refer to each of the three Laws of Motion. Make sure you name your sources!
Dynamics
Work Force Distance Velocity Time Mass Weight Acceleration
For the following questions we are assessing the LAYOUT of your work and your
PROBLEM SOLVING and REARRANGE EQUATIONS skills.
Carefully read each question. Refer to the skills sheet for help.
1/ Calculate the weight of a 0.3kg pigeon.
2/ Calculate the work done a swimmer spends swimming from one end of an Olympic
swimming pool to another, with an average force of 100N.
3/ Calculate the acceleration of a drone dropped from a space capsule above an unknown
planet if it reaches a speed of 200ms-1 in a time of 5 seconds.
4/ A snail slithers 4cm in 1 second. Calculate his speed in metres per second.
5/ Calculate the time it takes a car to travel 3 km at 20ms-1.
6/ A force of 65 N is applied to a 4kg block of ice. Calculate the initial acceleration of the
block.
7/ Calculate as many unknown quantities as you can given the initial information:
Initial velocity = 0
Mass = 5kg
time = 2 s
acceleration = 2ms-1
distance travelled = 6 m
Projectile Motion
For the following questions we are assessing your UNDERSTANDING and
EXPLANATION of motion in two dimensions.
Projectile motion is a great deal more complicated when friction is included. Fortunately
you can ignore it in the following questions.
1/ Bubbles the circus clown is fired from a cannonball at an angle of 45 degrees to the
ground. Her horizontal and vertical velocities are both 29.4 ms -1 as she leaves the cannon.
a/ Draw a sketch of the path she takes.
b/ Use your knowledge of vertical motion to show that it takes her 6 seconds to hit a net
(at the same level as the cannon).
c/ How far away should the net be placed?
2 / Use trigonometry to calculate the horizontal and vertical velocity of the following:
d/ Can you explain a method to find which one of the above projectiles travels the furthest?
3/ Sputnik was the first man-made satellite to orbit the Earth. Use your knowledge of
gravity, projectiles and the shape of the Earth to explain how orbit is possible.
Space Exploration
For the following questions we are assessing your RESILIANCE, IMAGINATION and
INGENUITY.
1/ Go onto the website www.geocaching.com/. Choose a cache nearby to your house and
write a report on what you found.
2/ Design a simple probe for entry into a planet or moon’s atmosphere. Choose either
Titan, Europa, Io or Venus. Your report should include the following:
Any particular difficulties with your chosen moon/planet.
How it will collect information about its surroundings.
How it will send the information back to earth.
How it will slow down land safely (if at all).
How will it cope with the extreme environment (pressure, temperature, humidity etc).
Cosmology
The following questions assess your PRESENTATION skills.
1/ In less than 100 words, use your knowledge of physics and astronomy to write a History
of the Universe. You may include a diagram if you wish.
2/ Use the diagram below to identify which elements are present in the star: