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Sidana [21]
3 years ago
14

I need help on this and the first person who will answer this correctly gets BRANLIST​

Physics
1 answer:
Nikolay [14]3 years ago
3 0

Answer:

i think it's b but i don't know for sure

Explanation:

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When a ball is launched from the ground at a 45° angle to the horizontal, it falls back to the ground 50 m from the launch point
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Answer:

Explanation:

Given

angle through which ball is launched=45^{\circ}

Range of ball=50 m

Range of projectile is =\frac{u^2sin2\theta }{g}

50=\frac{u^2sin90}{9.8}

u=22.136 m/s

If ball is thrown straight upward

v^2-u^2=2as

0-(22.136)^2=2(-9.8)s

s=\frac{22.136^2}{2\times 9.8}

s=25 m

(b)For Projectile time of flight is

t=\frac{2usin\theta }{g}

t=\frac{2\times 22.136\times sin45}{9.8}

t=3.19 s

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2 years ago
Two identical cars are parked in the sun on a warm day. One car is black and the other is white. Both cars are parked for three
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Answer:

black will be hotter because black paint absorbs light and white reflects it.

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2 years ago
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7. Two children of mass 20 kg and 30 kg sit balanced on a seesaw with the pivot point located at the center of the seesaw. If th
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Answer:

Explanation:

Given

mass of children m_1=20\ kg

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so torque of small child and heavier child must be equal

20\times (x)=30\times (3-x)

2x=9-3x

5x=9

x=1.8\ m    

7 0
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Measurements of two electric currents are shown in the chart. A 3-column table with 2 rows titled Electric Currents. The first c
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