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Nadya [2.5K]
3 years ago
15

Please Fill in the blanks

Physics
1 answer:
neonofarm [45]3 years ago
6 0
Has I believe is mass
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An Olympic diver springs off of a high dive that is 3 m above the surface of the water. When she lands in the water she is trave
klemol [59]

Answer:u=4.51 m/s\ at\ angle\ of\ \theta =59.34^{\circ}

Explanation:

Given

height of building h=3 m

Landing velocity of diver v=8.90 m/s at an angle of 75^{\circ}

Let u be the initial velocity of diver at an angle of \theta with horizontal

Since there is no acceleration in horizontal direction therefore horizontal component of velocity will remain same

u\cos \theta =8.9\cos (75)        ---- -----1

Considering Vertical motion

v^2-u^2=2as

here v=8.9\sin (75)

u=u\sin \theta

s=3 m

a=9.8 m/s^2

(8.9\sin (75))^2-(u\sin \theta )^2=2\times 9.8\times 3

u\sin \theta =\sqrt{(8.9\sin 75)^2-(2\cdot 9.8\cdot 3)}

u\sin \theta =3.886         ----------------2

Divide 2 and 1 we get

\tan \theta =\frac{3.886}{8.9\cos (75)}

\tan \theta =1.687

\theta =59.34^{\circ}

Thus u\cos (59.34)=8.9\cos (75)

u=4.51 m/s

7 0
3 years ago
Which of the following is correct for speed?
Olin [163]

Answer:

Speed is a "scalar" quantity

(C) is the correct answer

An object could travel at 10 m/s to some point and then return to the origin at 10 m/s for an average speed of 10 m/s, however it's displacement over that time would be zero for a net velocity of zero.

4 0
3 years ago
What is the force in N of an object that has a mass of 7 kilograms and acceleration of 6 m/s/s
Marina86 [1]

Newton's 2nd law of motion:         Force = (mass) x (acceleration)

If you want to move a 7-kg object with an acceleration of 6 m/s²,
then you will need to push it with (7 x 6) = 42 newtons of force.

You don't mean the force of an object.

4 0
3 years ago
As a woman carries her suitcase up a flight of stairs, she does work against
Rashid [163]

Answer:

C. 1176 J

Explanation:

12 x 9.8 x 10

Hope it helpss

4 0
3 years ago
Which isotope is least likely to be stable?<br> A) Ca-40 <br> B) Cl-38 <br> C) U-235 <br> D) Xe-136
aksik [14]

Answer:

C) U-235

Explanation:

On Isotope stability, an isotrope will be least stable when Proton and newtron are both odd.

8 0
3 years ago
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