1800-150-456-789
FlagBACK
Flag Mechanics> Q- The masses of blocks A,B and C are 1,2...
question mark

Q- The masses of blocks A,B and C are 1,2 and 0.5kg respectively. All surfaces are smooth . If force F=50N acts as shown at the instant shown. Find the force which A exerts on b and the accl. of C. (ANS= block C will not move. my question is WHY? all sufaces are smooth. Please explain this part clearly especially with the concept of relative accl or pseudo accl and also if it has something to do with centre of mass or conservation of momentum( on block C).ans​2) accl of a =accl of B=50/3 I did it like 50= (1+2+0.5)accl which comes out to be 100/7. Clear my concept.

dsr , 6 Years ago
Grade 9
anser 1 Answers
Eshan

Last Activity: 6 Years ago

Dear student,

Had there been enough friction that the block C would not slide over B but move along with it, you could have assumed the acceleration of all of them to be same and used your method.

However, here, all surfaces are frictionless. Therefore, the block C will slip over block B without exerting any friction. Hence the blocks A and B will move with same accelerationa=\dfrac{50}{1+2}m/s^2.

Provide a better Answer & Earn Cool Goodies

Enter text here...
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free

Enter text here...

Other Related Questions on Mechanics

question mark
A metal strip clamped at one end vibrates with a frequency of 20 Hz and amplitude of 5 mmat the free end, where a small mass of 2 g is positioned. determine(i) The velocity of the end when passing through the zero position(ii) The acceleration at maximum displacement(iii) The maximum kinetic energy of the mass
Mechanics
2 Answer Available

Last Activity: 2 Year ago(s)

question mark
An object of mass m = 0.25 kg oscillates in a fluid at the end of a vertical spring of springconstant kH = 85 N/m, see Fig.1. The effect of the fluid resistance is governed by thedamping constant b = 0.07kg/s.(i) Find the period of the damped oscillation.(ii) By what percentage does the amplitude of the oscillation decrease in each cycle?
Mechanics
1 Answer Available

Last Activity: 2 Year ago(s)

question mark
If a=x² find the displacement at t =3sec if body velocity at t= 0 sec is 0
Mechanics
1 Answer Available

Last Activity: 2 Year ago(s)

question mark
A particle is traveling in a circle of radius R =2.5m and with an angular velocity of 10 rad/s. What is the centripetal acceleration of the particle? The particle begins to slow down with an angular acceleration of -1 rad/s2. After 5 seconds, what is the centripetal acceleration and the tangential acceleration fo the particle?
Mechanics
1 Answer Available

Last Activity: 2 Year ago(s)

question mark
If the acceleration of block A is 5 m/s^2Find the acceleration of block B
Mechanics
1 Answer Available

Last Activity: 2 Year ago(s)