3 years ago

What is the most important thing to remember when using a presentation aid during a speech?

Physics

1 answer:

Gala2k [10]3 years ago

8 0

Answer:

Ensure each member of the audience can see and read the aid.

Explanation:

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What happens to the acceleration of an object if the net force that acts on it triples in magnitude?

poizon [28]

F=ma Force is equal to mass times acceleration.

So looking at the equation if mass stays the same but we make F three times larger then acceleration will become 3 times larger as well because the equation must remain equal on both sides.

just multiply both sides of the equation F=ma times 3. So 3xF=3x ma

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A pole-vaulter is nearly motionless as he clears the bar, set 4.2 m above the ground. He then falls onto a thick pad. The top of

Inessa05 [86]

initial height of the pole vaulter = 4.2 m

height of the pole vaulter just before it touch the pad = 80 cm

so the total displacement of pole vaulter just before he will touch the pad = 4.2 - 0.80 = 3.4 m

now by kinematics

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

$v_f^2 - 0^2 - 2* 9.8*3.4$

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now after this he will come to rest after compressing the pad by 50 cm

so again we can use kinematics to find its acceleration

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