Question

Determine the force on the ground by a wooden block, if it has a surface area of 2000cm², and mass of 20 kg.​

Answer 1

Answer:

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Explanation:

ANSWER

Mass of the wooden block, m=5kg

Thrust due to wooden block,

Mg=5kg×9.8ms

−2

=49N

(a) Surface area of 20cm×10cm surface,

A=(20×10)cm

2

=(0.2×0.1)m

2

=0.02m

2

P=

A

mg

P=

0.02m

2

49N

=

0.02

49

Nm

−2

or Pressure, P=2450Nm

−2

.

(b) Surface area of 40cm×20cm surface,

A=(40×20)cm

2

=(0.4×0.2)m

2

=0.08m

2

P=

0.08m

2

49N

=

0.08

49

Nm

−2

or Pressure, P=612.5Nm

−2

.

Answer 2

Answer:

Force = 4 Newton

Explanation:

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