Question

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Answer 1

Answer:

Step-by-step explanation:

1. here a = 10m/s2

force = ma

         = 100 x 10

         = 1000 kg.m/s2

          = 100N

2. don't know

3. P = F/A

P= 800 / 2

= 400 N/m2

= 400 Pa

4. F= 20,000 N

A = 1000 cm2  [ to get pressure we take m2 as units as N/m2 is Pascal ]

here we divide 1000 by 100 x 100 bcoz 1m = 100cm and 1cm2  = 100 x 100m2

  = 1000 / 100 x 100 = 0.1 m2

P = F /A

 = 20000 x 10/1 or 20000 /0.1

 = 2,00,000 N/m2  = 2,00,000 Pa

   

5. force 1 = 7N

force 2 = 10N

Net force = 10N - 7N  = 3N

bcoz they are acting in opposite directions. if they are acting in same direction then we should add.

                 

hope it is helpful..

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