Calculating Acceleration

In February 1955, a paratrooper fell 1200 ft from an

-Dominant- [34]

Answer:

$s=1.1107\ m$ is the minimum depth of snow for survivable stopping.

Explanation:

Given:

terminal velocity of fall, $u=56\ m.s^{-1}$

mass of the paratrooper, $m=85\ kg$

force on the paratrooper by the ice to stop him, $F=1.2\times 10^5\ N$

Firstly, we calculate the deceleration caused in the snow:

$a=\frac{F}{m}$

$a=\frac{120000}{85}$

$a=1411.765\ m.s^{-2}$

Now, using equation of motion:

$v^2=u^2+2a.s$ ....................(1)

where:

v = final velocity of the body after stopping

u = initial velocity of the body just before hitting the snow

a = acceleration of the body in the snow

s = distance through in the snow

Putting respective values in eq. (1)

$0^2=56^2+2\times (-1411.765)\times s$

$s=1.1107\ m$

5 0

3 years ago

QUIK!!!!!!!!!!!!! 1. Compare your scores to your partner’s scores. Explain the reason for any differences. 2. How can improving

kvv77 [185]

2.Improving my balance and coordination can affect my performance in sports or recreational activities by planing better in activities also improving my speed. My activities all need skills that I am really good at.
3.The activity that was most difficult for me to perform was the Stork Stance test because I am not good with balancing and that is something I need to improve.
4.An activity that could help improve my striking and my reaction time.
5.One sport that I have never done but that I would like to try one day is baseball.
One element of skill-related fitness that is important to being successful in the activity is speed and reaction time skills.6. Running, jogging, sprinting, and jump roping.

6 0

4 years ago

Jack is planning an experiment to see how temperature can affect the reproduction rate of a certain species of bacteria. Jack is

stealth61 [152]

The answer is C. temperature, light level, species of bacteria. All three variables are considerations regarding the reproduction rate of the bacteria. The other three answer choices can be eliminated easily because they each contain at least one irrelevant variable. In particular, all three contain a variable that makes reference to Jack's personal characteristics. These do not have any impact on the experiment and readily stand out to disqualify the entire answer choice.

6 0

4 years ago

Read 2 more answers

When light reflects off an object, what is the relation between the angle of incidence and the angle of reflection?

Mashutka [201]

Angle of incidence is the angle when the light strikes an object while angle of reflection is the angle produced when the light strikes off/reflects from the object.

The relation between these two is that both the angles are equal.

The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.

Hope this helps!

7 0

3 years ago

Suppose you start an antique car by exerting a force of 270 N on its crank for 0.275 s. What angular momentum is given to the en

Ksenya-84 [330]

Answer:

$L_f=22.27\ kg-m^2/s$