Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

a plank of mass 2kg and length 1m is placed on horizontal floor, a small block of mass 1kg is placed o top of the plank,at its extreme end. the co efficient of friction between plank and floor is 0.5 and that between plank and block is 0.2 .if a horizontal force=30N starts acting on the plank to right,the time after which,the block will fall off the plank?

a plank of mass 2kg and length 1m is placed on horizontal floor, a small block of mass 1kg is placed o top of the plank,at its extreme end. the co efficient of friction between plank and floor is 0.5 and that between plank and block is 0.2 .if a horizontal force=30N starts acting on the plank to right,the time after which,the block will fall off the plank?

Grade:Upto college level

1 Answers

Badiuddin askIITians.ismu Expert
147 Points
11 years ago

Dear akash

 

6406-273_7662_1.JPG

let at time t small block cover a distance x

and for amall block to fall plank must cover (x+1) m in time t

accelarion of small block=2/1 =2

acceleration of plank =(30-15-2)/2 =13/2

so x= 1/2 *a1 *t2   =   t2 .................1

and

x+1 =1/2 *a2*t2

put value of x from equation 1

 t2 +1 =1/2 *a2*t2

t=2/3 sec


Please feel free to post as many doubts on our discussion forum as you can.
 If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly.
 We are all IITians and here to help you in your IIT JEE  & AIEEE preparation.

 All the best.
 
Regards,
Askiitians Experts
Badiuddin     

 

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free