QUESTION 1
A car of mass 800 kg is pulling a trailer of mass 300 kg up the slope of angle ? to the horizontal where sine ? = 1/200. Resistance to motion (apart from gravity) is 1.5 N per kg of mass for each vehicle. Calculate the pull of the engine and the tension in the tow -bar when they are:
(a) Moving with constant velocity,
(b) Accelerating at 0.2m/s2

QUESTION 2
(a) A pump raises water through a height of 15m at the rate of 0.05m3 per second. What is the power of the pump?
(b) A constant force acts on a body of mass 2kg and does 45j of work. The effect on the body is that its final velocity is 2m/s more than its initial velocity. Find the initial velocity of the body.

QUESTION 3
(a) A hose (cross-section 4cm2 ) delivers water horizontally with a speed of 25m/s. What is the impulse of the water on a vertical wall (assuming no rebounds)? What average force acts on the wall?
(b) Two masses of 30kg and 20kg, traveling at 4m/s and 1m/s respectively in the same direction, collide and continue together. Find their common speed after the collision?

QUESTION 4
(a) A 600 kg satellite is in circular orbit about Earth at a height above Earth equal to Earth‘s mean radius. Find:
(i) The satellite’s orbital speed,
(ii) The period of its revolution ,
(iii) The gravitational force acting on it.
(b) A 50g mass moves as a conical pendulum with string length 9 x and speed v. if the radius of the circular motion is 7 x find:
(i) The string tension (answer to 2 d .p.),
(ii) V in terms of x, g.

Posted Date: 3/11/2013 7:09:01 AM | Location : Botswana

Ask an Expert

Related Discussions:- cicular motion, Assignment Help, Ask Question on cicular motion, Get Answer, Expert's Help, cicular motion Discussions

Write discussion on cicular motion
Your posts are moderated

Write your message here..

Related Questions

Define cathode rays, Cathode rays, discovered by Sir Willium Crooke are the... Cathode rays, discovered by Sir Willium Crooke are the stream of electrons. They may be given by using a discharge tube containing gas at a low pressure of the order of 10-2 mm of

An elementary particle, An elementary particle is: (1)An element presen... An elementary particle is: (1)An element present in a compound      (2)An atom present in an element   (3)A sub-atomic particle (4)A fragment of an atom Ans: (3)A s

Compute the threshold wavelength, Q. The work function of a metal surface i... Q. The work function of a metal surface is 1.8 eV. Compute the threshold wavelength.  Work function W = hγ o = h C / λ 0 λ 0 = h C / W = 6.626 X 10 -34 X 3 X 10 8

What are the properties of ultrasonic waves, What are the properties of ult... What are the properties of ultrasonic waves? Properties of Ultrasonic Waves are as follows: a. Ultrasonic waves are acquiring frequencies higher than20 KHz and therefore th

Which colours of visible light has the longest wavelength, Which of the fol... Which of the following colours of visible light has the longest wavelength? Is it: a) Violet b) Green c) Yellow d) Red Ans: Red colour of visible light h

Draw a force diagram, The magnitude of a charge, q, is to be determined by ... The magnitude of a charge, q, is to be determined by transferring the charge equally to two pith balls. Each of the pith balls has a mass of m, and is suspended by an insulating th

How will this image be dissimilar from the one obtained, The image of a can... The image of a candle is produced by a convex lens on a screen. The lower half of the lens is painted black to make it completely opaque. Illustrate the ray diagram to show the ima

Radial acceleration..., So I have a question here and I am totally lost: A ... So I have a question here and I am totally lost: A car starts from rest and accelerates at a constant rate of 1.1 m/s2. If the radius of the car wheels is 29.0 cm, and the final an

Total polarization, In the presence of electronic, ionic and dipolar polari... In the presence of electronic, ionic and dipolar polarization mechanisms, t he average induced  dipole moment per molecule will be the sum of all the contributions in terms of the

Motion in one dimension, South African frogs are capable of jumping as far ... South African frogs are capable of jumping as far as 10.0m in one hop. Suppose one of these frogs makes exactly 15 of these jumps in a time interval of 60.0s. What is the frogs ave