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2 years ago

13

Select the correct answer. which object has the least amount of kinetic energy? a. a car driving down a road b. a soccer ball ro

lling down a hill c. a bicycle locked to a bike rack d. a satellite orbiting earth

1 answer:

solniwko [45]2 years ago

4 0

Answer:

c. a bicycle locked to a bike rack

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What does it signify if point 2 shifts down and to the left?

jeka94

It signifies a translation

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3 years ago

Imagine holding two identical bricks under water. Brick A is just beneath the surface of the water, while brick B is at a greate

FromTheMoon [43]

Answer:

I think it's c

Explanation:

The brick's mass, helps to hold it under the water but brick A is being held up. If you dropped the brick, it would sink to the bottom. You need a stronger force to hold it up.

Hope this helps you! x

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3 years ago

If you double the dimensions of a cube what happens to the volume

Triss [41]

By definition, a cube is a three-dimensional figure that have equal dimensions for all its sides. It comprises of two square bases, one on top and one on the bottom. The face sides are also squares. Therefore, the volume of a cube is equal to s³, where s is the measure of the side's length. To compare the change, let us assume values. First, suppose s=1. Then, we denote this volume as V₁.

V₁ = (1)³ = 1

Next, taking the double, s=2. The volume for this is denoted as V₂.

V₂ = (2)³ = 8

Taking the ratio of V₂ to V₁:

V₂/V₁ = 8

That means the scale factor is 8. When the side dimensions is doubled, the volume of the cube increases 8 times as great as the original volume.

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3 years ago

A pelican flying along a horizontal path drops a fish from a height of 4.7 m. The fish travels 9.3 m horizontally before it hits

slavikrds [6]

Answer:

(A) 9.5 m/s

(B) 5.225 m

Explanation:

vertical height (h) = 4.7 m

horizontal distance (d) = 9.3 m

acceleration due to gravity (g) = 9.8 m/s^{2}

initial speed of the fish (u) = 0 m/s

(A) what is the pelicans initial speed ?

lets first calculate the time it took the fish to fall

s = ut + $(\frac{1}{2}) at^{2}$

since u = 0

s = $(\frac{1}{2}) at^{2}$

t = $\sqrt{\frac{2s}{a} }$

where a = acceleration due to gravity and s = vertical height

t = $\sqrt{\frac{2 x 4.7 }{9.8} }$ = 0.98 s

pelicans initial speed = speed of the fish

speed of the fish = distance / time = 9.3 / 0.98 = 9.5 m/s

initial speed of the pelican = 9.5 m/s

(B) If the pelican was traveling at the same speed but was only 1.5 m above the water, how far would the fish travel horizontally before hitting the water below?

vertical height = 1.5 m

pelican's speed = 9.5 m/s

lets also calculate the time it will take the fish to fall

s = ut + $(\frac{1}{2}) at^{2}$

since u = 0

s = $(\frac{1}{2}) at^{2}$

t = $\sqrt{\frac{2s}{a} }$

where a = acceleration due to gravity and s = vertical height

t = $\sqrt{\frac{2 x 1.5 }{9.8} }$ = 0.55 s

distance traveled by the fish = speed x time = 9.5 x 0.55 = 5.225 m

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3 years ago

What is the name of the upward force<br> exerted on a boat in water?

White raven [17]

Answer:

Buoyant force

Explanation:

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3 years ago

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