Answer:
The displacement of the elephant before it comes to a stop is <u>3301.8 m</u>.
Explanation:
Given:
Mass of elephant is,
Initial velocity of elephant is,
Final velocity of elephant is,
Stopping force exerted by the brakes is,
As per Newton's second law, net force is equal to the product of mass and acceleration.
So, the stopping force is equal to the product of mass of elephant and stopping acceleration. Therefore,
Stopping force (f) = mass (m) × stopping acceleration
Now, using equation of motion, we find the total displacement of the elephant before it comes to a stop.
Let the total displacement be 'S'.
Using the equation of motion as below:
Therefore, the displacement of the elephant before it comes to a stop is 3301.8 m.
Answer:
A: 0.83 Hz
Explanation:
Frequency can be calculated in a multitude of ways. The one way that is going to help you solve this problem is (# of times/seconds)
so you would divide 85 swings/102 seconds
= 5/6 or 0.8333 Hz
so your answer is A
Answer:
Your body just being crushed from the side. With a side-impact we see much more severe injuries to the thorax and upper-body; you get a lot more rib fractures; a lot more damage to the lungs and internal organs because of the side-impact.
Explanation:
.
Answer:
a. the density will not change
b. D' = 0.125 D
So, the density will change by a factor of 0.125
Explanation:
a.
Density is the material property and the value of density is constant for all solid materials. So, when the dimensions of the a solid are increased, while the material is same, then the material must be added to the object for increasing its dimensions. So, with the increase in the volume, the mass of the object also increases. And as a result the density of the object remains constant.
Since, here the material remains the same.
<u>Therefore, the density will not change</u>
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b.
Density = mass/Volume
D = m/V ------------ equation (1)
Now,
V = LWH ----------- equation (2)
Now, if each dimension increases by a factor of 2, the volume becomes:
V' = (2L)(2W)(2H)
V' = 8 LWH
using equation (2)
V' = 8 V
So, for constant mass, density becomes:
D' = m/V'
D' = m/8V
using equation (1)
D' = D/8
<u>D' = 0.125 D</u>
<u>So, the density will change by a factor of 0.125</u>