Question

A block of mass 5 kg is kept on a rough horizontal surface. A force of 100 N is applied on the block (Given us = 0.5 uk = 0.4). Find
acceleration of block
O 16 m/s2
O 15 m/s2
O 20 m/s2
O Zero​

Answer 1

Answer:

Pls mark me as brainliest

Explanation:

Pls mark me as brainliest

Answer 2

Given

A block of mass 5 kg is kept on a rough horizontal surface. A force of 100 N is applied on the block ( μk = 0.4 )

To Find

Acceleration of the block

Solution

• Mass , m = 5 kg
• Force , F = 100 N
• Coefficient of kinetic friction , μk = 0.4

$\bf \pink{ \Sigma F_x=ma}\\\\\to \rm (F-F_f)=ma$

where ,

• F denotes force
• Ff denotes frictional force
• m denotes mass
• a denotes acceleration

$\to \rm (100-\mu_k N)=ma\\\\\to \rm (100-\mu_k\ (mg))=ma\\\\\to \rm (100-(0.4)(5\times 10))=5a\\\\\to \rm (100-20)=5a\\\\\to \rm 5a=80\\\\\bf \to \green{a=16\ m/s^2\ \; \bigstar}$

So , Option (1) is correct