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3 years ago

Question 4 of 10

Physics

1 answer:

ch4aika [34]3 years ago

4 0

Habitat fragmentation is a cost of urban development.

Option: A

Explanation:

Though from the view point or perspective of up gradation and development urban development is much needed but in cost of habitat fragmentation which feels very bitter. As habitat fragmentation leads to the loss of habitat, disruption of ecological cycle and environmental equilibrium.

Actually in the name of urban development we the human use our bread giver environment in a wrong way which causes natural disasters in long run. Animals become endangered , vulnerable and extinct with passage of time. Because they forced to enter into human settlements.

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A) a 50 kg gymnast jumps from the balance beam with a speed of 1.7m/s. she lands upright on the ground 124cm below. At what spee

ivolga24 [154]

PART a)

By energy conservation we can say

$PE_i + KE_i = PE_f + KE_f$

$mgh_1 + \frac{1}{2}mv_i^2 = mgh_2 + \frac{1}{2}mv_f^2$

divide whole equation by mass "m" and plug in all given data

$9.8(1.24) + \frac{1]{2}(1.7)^2 = 9.8(0) + \frac{1}{2}(v)^2$

$v_f = 5.21 m/s$

so gymnast will reach the floor with speed 5.21 m/s

PART b)

Now the gymnast bend her knees by 0.1 m and comes to rest

so here we will have

$v_f^2 - v_i^2 = 2 a d$

$0 - 5.21^2 = 2(a)(0.1)$

$a = 135.97 m/s^2$

now the force on the gymnast will be

$F = ma$

$F = 50 \times 135.97 = 6798.5 N$

so during landing the force will be 6798.5 N

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3 years ago

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Read 2 more answers

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Answer:

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