Your scores on the PFT will affect your grade Question 1 options: True False

What were the physical activities in your childhood that you still do today? Do you spend more time now in doing these activitie

user100 [1]

I used to play tag or run around a lot and sometimes i do these activities but its a lot less now that i am older

5 0

4 years ago

If a dog ran at 5 m/s how far would it run in 45 s

Virty [35]

Answer:

225 m//s

Explanation:

It ran 5m/s so 5x45=225

3 0

3 years ago

Read 2 more answers

What is tolerance? ?????????

aev [14]

Answer:

Toleration is the allowing, permitting, or acceptance of an action, idea, object, or person which one dislikes or disagrees with

Explanation:

may i get brainlist?

4 0

3 years ago

A proton of mass 1.67×10-27 kg is being accelerated along a straight line at 7.01×1015 m/s2 in an accelerator. If the proton has

Masja [62]

Answer:

$v_f=7*10^7\frac{m}{s}$

Explanation:

The proton is under a linear motion with constant acceleration. So, we use the kinemtic equations to calculate its final speed. We know its acceleration, its initial speed and its traveled distance. Thus, we use the following equation:

$v_f^2=v_0^2+2ax\\v_f=\sqrt{v_0^2+2ax}\\v_f=\sqrt{(6.63*10^7\frac{m}{s})^2+2(7.01*10^{15}\frac{m}{s^2})(3.63*10^{-2}m)}\\v_f=7*10^7\frac{m}{s}$

5 0

4 years ago

Which of the following statements are true of the horizontal motion of projectiles? List all that apply.a. A projectile does not

r-ruslan [8.4K]

Answer:

d. A projectile with a horizontal component of motion will have a constant horizontal velocity.

f. The horizontal velocity of a projectile is unaffected by the vertical velocity; these two components of motion are independent of each other.

g. The horizontal displacement of a projectile is dependent upon the time of flight and the initial horizontal velocity.

h. The final horizontal velocity of a projectile is always equal to the initial horizontal velocity.

Explanation:

When we are dealing with parabolic motion, the x-component of the velocity remains the same (hence, in the case of the horizontal component, the acceleration will always be zero), while the y-component always change because it is affected by the acceleration due gravity that acts verticaly.

On the other hand, the horizontal displacement $x$ of the projectile is mathematically expressed as:

$x=V_{ox} t$

Where:

$V_{ox}$ is the projectile's horizontal component of the initial velocity

$t$ is the time the parabolic motion lasts

This means the projectile's horizontal displacement is directly proportional to the horizontal component of the initial velocity and the total time the projectile describes the parabolic motion.

Of course, all of this considerations are assuming this is an ideal parabolic path and there is no air resistance.

5 0

4 years ago