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iris [78.8K]
3 years ago
9

A 12 kg object is moving at 10 m/s to the right. It collides with a 20 kg object moving at 7

Physics
1 answer:
Illusion [34]3 years ago
8 0

Answer:

Change in velocity

−2−10=−12

Time required is 4 seconds

a=Δv/t

=−12/4

=−3m/s²

Hence,

option C is correct answer.

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The pivot point of a lever is called the fulcrum. please select the best answer from the choices provided t f user: the thread a
kkurt [141]

It is TRUE. The pivot point of a lever is called the fulcrum .

4 0
3 years ago
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A bullet is fired horizontally from a 17.7 m high cliff at a speed of 482.0. What is the distance from the cliff that the bullet
Marysya12 [62]

Answer:

Horizontal distance=?m

Explanation:

Horizontal velocity,u=482ms⁻¹

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5 0
3 years ago
What is kinetic energy of 6 kg bowling ball if it is going 6.1 m/s
weqwewe [10]

Answer:111.63 joules

Explanation:

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7 0
3 years ago
Ciara is swinging a 0.015 kg ball tied to a string around her head in a flat, horizontal circle. The radius of the circle is 0.5
Marat540 [252]

Answer:

Option C

Explanation:

From the question we are told that:

Mass m=0.015kg

Radius r=0.5m

Time t=0.70

Generally the equation for Tension is mathematically given by

 T=\frac{4mr}{t^2} \pi

 T=\frac{4*0.015*0.5}{(0.70)^2} (3.142)

 T=0.60N

Therefore

T=0.60 N, toward the center of the circle

Option C

3 0
4 years ago
When a flat slab of transparent material is placed under water, the critical angle for light traveling from the slab into water
Novosadov [1.4K]

Answer:

(a) 40.6 degree

Explanation:

When refraction takes place from slab to water, the critical angle is 60 degree.

Use Snell's law

refractive index of water with respect to slab

\mu _{w}^{s}=\frac{Sin60}{Sin90}

\frac{\mu _{w}}{\mu _{s}}=0.866

\frac{1.33}{\mu _{s}}=0.866

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Now for slab air interface, the critical angle is C.

\mu _{a}^{s}=\frac{SinC}{Sin90}

\frac{\mu _{a}}{\mu _{s}}=\frac{SinC}{Sin90}

1 / 1.536 = Sin C

C = 40.6 degree

3 0
3 years ago
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