There a mass of 4kg and a mass of 5kg connected by an inextensible string passing over a smooth pulley .the mass for 4kg starts from rest and moves up the smooth plane inclined at 30degree to horizontal...
There a mass of 4kg and a mass of 5kg connected by an inextensible string passing over a smooth pulley .the mass for 4kg starts from rest and moves up the smooth plane inclined at 30degree to horizontal...
The blades of a wind mill sweep out a circle of area A.If wind flows with velocity v perpendicular to blades of wind mill and its density is D,then the mechanical power received by wind mill is (a)...
A car of mass m has an engine which can deliver power P.The minimum time in which car can be accelerated from rest to a speed v is (a) (mv^2)/2P (b) Pmv^2 (c) 2Pmv^2 (d) (mv^2)P/2...
A particle with total energy E in Potential energy region U(x).Motion of the particle is restricted to the region when options are (a) U(x)>E (b) U(x)<E (c) U(x)=0 (d)...
how many feet of cable are needed to connect the deck to the main cables between the two towers? show all your work? assume that we need to build a bridge that spans 2400 feet. The two towers,...
A pump is used to pump a liquid of density D continuously through a pipe of cross section area A.If liquid is flowing with speed v,then power of pump is (a) (DAv^2)/3 (b) (DAv^2)/2 (c)...
A young girl (m = 30 kg) rides a skateboard (m = 3.2 kg) at a speed of 4.2 m/s. (a) How much work does the girl have to do to bring herself to a stop? (b) How far does she travel if it takes 6.0 s...
bob wanted to buy a sweater which cost $97.00. Mom gave him $50.00 and dad gave him $50.00. He bought the sweater and received $3.00 change. He gave dad $1.00 and mom $1.00 and kept...
How much work is done in lifting the spaceship to an altitude of 70 miles? a. 2450 mi-tons b. 2100 mi-tons c. 3500 mi-tons d. none of these
The force pulling an object to earth is where G is the gravitational constant, M is the mass of the Earth, m is the mass of the object, and r is the distance between the object and the center...
a. W=F+d b. W=F-d c. W=Fd d. W=F/d
you are working in an event management department, a coworker having the same job scale has been asked to work with you, the coworker is rude and biased but she has good terms with the manager of...
Suppose a gas of 2D atoms is trapped inside a square of area A. What is the expression for the work done on the system as the area of the square changes?
Find the work required to lift a mass of 5 tonnes to a height of 30m. If this is done in 2 minutes, what power is being used?
A boy pulls a 10.0 kg book rack at rest on a smooth floor with a constant horizontal force of 1.2N starting from rest. Compute the change in kinetic energy of the box after the...
A cylindrical tank of radius 4 ft and length 12 ft is lying on its side on horizontal ground. The tank initially is full of gasoline weighing 40 lb/ft3. How much work is done in pumping all this...
A ramp is inclined at 12 degrees to the horizontal. A cart is pulled 8m up the ramp by a force of 120N, at an angle of 10 degrees to the surface of the ramp. Determine the mechanical work done against...
Which is a function? A. (2,9),(-1,1),(-1,-2),(1,-1) B. (2,9),(9,-1),(2,1) C. (2,9),(9,2),(1,1) D. {2,9,-1,1}
Hello. I NEED HELP WITH THIS EQUATION MY OWN TUTOR GAVE ME TO SOLVE. ASAP :)