Question

7. A block of mass 3 kg which is at rest on a surface is pulled horizontally by a force. If the displacement of the block is 15 m in
the first 3 s and the surface offers a
resistance of 2 N, find the sequence of steps to calculate the magnitude of applied force.



(a) Note down the values of s, u, t and
frictional force.
(b) The applied force on the block is the sum
of frictional force and net force.
(c) Substitute the values of s, u and t in the
equation of motion and solve for 'a'
(d) Using Newton's second law of motion,
calculate the net force acting on the block.


(1) a d b c
(2) a c b d
(3) a c d b
(4) a b d c​

Answer 1

Answer:

Mass of block = 3 kg

Displacement of block = 15 m

Time = 3 s

Frictional force = 2 N

To Find :

Total force applied to move the block

Solution :

Mass of block = 3 kg

Displacement of block = 15 m

Time = 3 s

Frictional force = 2 N

To Find :

Total force applied to move the block

Solution's

Total force applied on block is 12

Explanation:

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