A boy stands on the ground. The area below his feet is 70 cm $^{2}$ . The pressure he exerts on the ground is 7 N/cm $^{2}$ . Calculate the total force acting on the ground.

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Solution

Area under the boy's feet = 70 cm $^{2}$
Pressure exerted by the boy on the ground = 7 N/cm $^{2}$
Total force acting on the ground = Pressure × Area
Force = 7 $\times$ 70 = 490 N
Thus, the force exerted by the boy on the ground is 490 N.

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A boy stands on the ground. The area below his feet is 70 cm2. The pressure he exerts on the ground is 7 N/cm2. Calculate the total force acting on the ground.

Area under the boy's feet = 70 cm2 Pressure exerted by the boy on the ground = 7 N/cm2 Total force acting on the ground = Pressure × Area Force = 7 × 70 = 490 N Thus, the force exerted by the boy on the ground is 490 N.

A boy stands on the ground. The area below his feet is 70 cm $^{2}$ . The pressure he exerts on the ground is 7 N/cm $^{2}$ . Calculate the total force acting on the ground.

Area under the boy's feet = 70 cm $^{2}$
Pressure exerted by the boy on the ground = 7 N/cm $^{2}$
Total force acting on the ground = Pressure × Area
Force = 7 $\times$ 70 = 490 N
Thus, the force exerted by the boy on the ground is 490 N.