Q- two carts A and B of mass 10 kg each are placed on a horizontal track They are - Science - Force and Laws of Motion

Question

Q- two carts A and B of mass 10 kg each are placed on a
horizontal track They are joined tightly by a light but strong rope
C a man holds the cart A and pulls it towards the right with a
force of 70N The total force of friction by the track and the air
on each cart is 15N,acting toward the left Find:-
(a) the acceleration of the cart
(b) the force exerted by the rope on the car B

Komal Jain · Accepted Answer

The mass of both the carts is 10 kg
The figure shows the forces acting on the cart:
<img alt="" src=
"https://s3mn%20mnimgs%20com/img/shared/content_ck_images/images/IMG-20140922-00380%20jpg"
style="width: 480px; height: 360px;">
The resultant force acting,F=F1-F2⇒(m1+m2)a=70-15⇒(10+10)a=55⇒a=5520=114 m/s2Therefore, the force exerted by the rope on the cart B,T=mBA=10×114=27
5 N