Results
Q1. An aircraft’s mass is a result of:
Ans: – how much matter it contains.
Q2. The unit of mass is the:
Ans: – kilogram.
Q3. The definition of a force is:
Ans: – a push or a pull.
Q4. The unit of force is the:
Ans: – newton.
Q5. The unit of weight is the:
Ans: – newton.
Q6. Weight is the result of:
Ans: – the force on mass due to gravity.
Q7. About which point does an aircraft rotate?
Ans: – The centre of gravity.
Q8. If a force is applied to a mass and the mass does not move:
Ans: – no work is done.
Q9. The unit of work is called the:
Ans: – joule.
Q10. The unit of power is called the:
Ans: – watt.
Q11. If a force of 20 newtons moves a mass 5 metres:1-the work done is 100 Nm2- the work done is 100 joules3- the work done is 4 joules4- the work done is 0.25 joulesThe correct statements are:
Ans: – 1 and 2.
Q12. If a force of 50 newtons is applied to a 10 kg mass and the mass moves 10 metres and a force of 50 newtons is applied to a 100 kg mass which moves 10 metres:
Ans: – the work done is the same in both cases.
Q13. The definition of power is:
Ans: – the rate of doing work.
Q14. If a force of 500 newtons moves a mass 1000 metres in 2 mins, the power used is:
Ans: – 4167 watts.
Q15. Kinetic energy is:
Ans: – the energy a mass possesses because of its motion.
Q16. The unit of kinetic energy is the:
Ans: – joule.
Q17. When considering kinetic energy:1- a moving mass can apply a force by being brought to rest.2 – kinetic energy is the energy possessed by a body because of its motion.3 – if a body’s kinetic energy is increased, a force must have been applied.4 – kinetic energy =1/2 m V² joules. The combination of correct statements is:
Ans: – 1, 2, 3 and 4.
Q18. The property of inertia is said to be:
Ans: – the opposition which a body offers to a change in motion.
Q19. Considering Newton’s first law of motion:1 – a body is said to have energy if it has the ability to do work.2 – the amount of energy a body possesses is measured by the amount of work it can do.3 – a body will tend to remain at rest, or in uniform motion in a straight line, unless acted upon by an external force.4 – to move a stationary object or to make a moving object change its direction, a force must be applied.The combination with the correct statements is:
Ans: – 3 and 4.
Q20. Considering Newton’s second law of motion:1 – every action has an equal and opposite reaction.2- if the same force is applied, the larger the mass the slower the acceleration.3 – if two forces are applied to the same mass, the bigger the force the greater the acceleration.4- the acceleration of a body from a state of rest, or uniform motion in a straight line, is proportional to the applied force and inversely proportional to the mass.The combination of true statements is:
Ans: – 2, 3, and 4.
Q21. Newton’s third law of motion states:
Ans: – every action has an equal and opposite reaction.
Q22. The definition of velocity is the:
Ans: – rate of change of displacement.
Q23. When considering acceleration:1 – acceleration is the rate of change of velocity.2 – the units of acceleration are metres per second.3- the units of acceleration are kilogram-metres per second.4- the units of acceleration are seconds per metre per metre.The combination of correct statements is:
Ans: – 1 only.
Q24. The definition of momentum is:
Ans: – the quantity of motion possessed by a body.
Q25. A force of 24 newtons moves a 10 kg mass 60 metres in 1 minute. The power used is:1-24 watts.2-240 watts.3-force times distance moved in one second.4-force times the distance the mass is moved in one second.Which of the preceding statements are correct:
Ans: – 1, 3 and 4.
Q26. When considering momentum:1- momentum is the quantity of motion possessed by a body.2- momentum is the tendency of a body to continue in motion after being placed in motion.3- a mass of 2000 kg moving at $55~m/s$ has 110000 kg-m/s of momentum.4 – a large mass moving at $50~m/s$ will have less momentum than a small mass moving at $50~m/s$.The correct combination of statements is:
Ans: – 1, 2 and 3.
