Question

The block of mass 50 kg is being dragged on a smooth horizontal
surface by means of a truck with the help of a cable passing over a pulley as shown. Initially the block is at rest and it make an angle 30°, find the velocity of the block when 60°:

(a) 3 m/s

(c) 10 m/s

(b) 5 m/s

(d) 7 m/s​

Answer 1

Answer:

By balancing forces on block B

Tension in the string (T)=mg=10x10=100N

Friction force on block A = μmg=0.5x10x10=50N

Net force on block A = T - friction force on block A

=100−50=50N

Acceleration of A =

m

Net force on blockA

=

10

50

= 5 m/s 2

The system will move with 5 m/s

2

of acceleration.

Answer 2

Explanation:

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