### What is the change of momentum of the towed lorry

Assignment Help Science
##### Reference no: EM133063

QUESTION 1

(a) (i) Define a scalar quantity and a vector quantity giving 3 examples of each quantity. (ii) Explain the meaning of " triangle of forces", support your answer with an appropriate example

(iii) A mass of 5kg hangs from two light strings of lengths 3m and 4m from two points at the same level and 5m apart. Find the tension in each of the strings. (acceleration due to gravity g = 9.81 ms-2)

(b) (i) Define the terms velocity and acceleration giving the units used

(ii) A ball is thrown vertically upwards from the ground with an initial velocity u. The time taken by the ball to reach a height "h" is "T1". The ball then takes a further time of "T2" to return to the ground. Find in terms of T1 , T2 and g (acceleration due to gravity),

(a) The initial velocity u

(b) The height "h"

(c) The maximum height "H" reached by the ball

(c) (i) A helicopter , flying in a straight line at a constant height of 500 m with a speed of 75 metres per second , drops an object. The object takes a time "T" to reach the ground and travels a horizontal distance "D" in doing so. Taking acceleration due to gravity g = 10 ms-2 and ignoring air resistance , what are the values of "T" and "D"?

(ii) State Newton?s Second Law of motion and explain what is meant by the " impulse" of a force

(d) A driver whose lorry will not start seeks a tow from a second driver. The towing vehicle accelerates slowly from rest with the tow-rope slack ; when the rope becomes tight, the towed lorry starts to accelerate and the towing vehicle moves with a constant speed of 0.8 metres per second until the towed lorry , of mass 1000 kg, achieves the same speed

(i) What is the change of momentum of the towed lorry?

(ii) The average tension in the rope may be assumed to be 4000 N during the acceleration of the towed lorry. How far does the towed lorry travel from rest before it reaches the speed of 0.8 metres per second?

(iii) How far does the towing vehicle travel in this time?

QUESTION 2

(a) (i) Explain the meaning of the term thermal equilibrium

(ii) State Zeroth law of thermodynamics and explain its usage in temperature measurements

(b) (i) A scale of temperature needs the following

1. A thermometric property

2. Two fixed points

3. A numerical scale

Give three examples of thermometric properties and the types of thermometers in which they are used

(ii) What features are desirable in a thermometric property if it is to be used for thermometry?

(iii) Give four advantages of the platinum resistance thermometer and explain why it is not suitable for measuring rapid changes in temperature

(b) Describe a "Thermoelectric thermometer" giving an appropriate diagram and explaining how temperature readings are obtained

#### Questions Cloud

 Which would create a better product : Which would create a better product Discuss the use of counselling in mental health institutions : Discuss the use of counselling in mental health institutions Explain how mental illnesses are viewed across cultures? Explain how a packet is encapsulated : Explain how a packet is encapsulated What is the advantage when target is throughput and security : What is the advantage when target is throughput and securityty What is the change of momentum of the towed lorry : What is the change of momentum of the towed lorry The average tension in the rope may be assumed to be 4000 N during the acceleration of the towed lorry. How far does the towed lorry travel from rest before it reaches the speed of 0.8 metres per.. How to draw a hierarchy chart : How to draw a hierarchy chart Describe the modes of transmission of hiv virus : Explain how the Human Immunodeficiency Virus (HIV) replicates inside the human body Describe the modes of transmission of HIV virus Briefly describe the life cycle of Plasmodium in the human body during malarial infection Outline the role of the kidneys in homeostasis : Define homeostasis Outline the role of the kidneys in homeostasis Name another organ of the body involved in homeostasis and describe how it is achieved. Support your answer with a labelled diagram Briefly describe the different types of skeleton : Briefly describe the different types of skeleton Describe the sliding filament theory of muscle contraction

### Write a Review

#### Prominent faults

Research on the prominent faults

#### List five types of endocrine glands and give their functions

List five types of endocrine glands and give their functions Describe the functions of phagocytes, B lymphocytes and T lymphocytes and describe how they interact during an immune response

#### Complexity of cell surfaces

Lipid rafts provide another example of the complexity of cell surfaces in both their structural character and biologic functionality. Please explain the nature of these structures and their functionality.

#### Chemical equations illustrating chemical changes

BUBBLE MAP for EMPIRICAL EVIDENCE

#### Long-term effects of air pollution

Long-Term Effects of Air Pollution

#### Micro organisms

This project report reveals the fact and proves a specific objective mentioned to be studied upon.

#### Briefly describe the different types of skeleton

Briefly describe the different types of skeleton Describe the sliding filament theory of muscle contraction

#### Write a balanced equation for this reaction

Write a balanced equation for this reaction What mass of magnesium nitride was produced

#### The theory of evolution

The Theory of Evolution

#### Give one reason why aluminium is commonly recycled

Which property of aluminium makes it suitable for the manufacture of aircrafts Give one reason why aluminium is commonly recycled

#### Discuss the role that science plays in your daily life

Role that science plays in your daily life and Integrity, Intensity, Innovation, and involvement in scientific field

#### Casemix

Explain the statement 'Auditors and Clinical Coders are required to be aware of Ethical Considerations'

#### Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd