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3 years ago

How to solve the problem

Physics

2 answers:

erica [24]3 years ago

5 0

If you're looking for distance, you have to multiply the time and speed.

0.75 × 45 = 33.75

The rabbit hopped 33.75 m.

Olin [163]3 years ago

3 0

Distance = (speed) x (time)

The question gives you the rabbit's speed, and the length of time.
Just pluggum in and multiply.

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The total kinetic energy of two cars is measured before and after they crash into each other. The total kinetic energy of the tw

jenyasd209 [6]

Answer:

Option B, Some of the cars' kinetic energy was converted to sound and heat energy.

Explanation:

In an elastic collision, no energy is lost during and after collision. Thus, it can be said that in an elastic collision both momentum and kinetic energy remains conserved.

While in non-elastic collision, kinetic energy of the system is lost. However, the momentum of the system is conserved. Generally, during and after collision some of the kinetic energy is lost as thermal energy, sound energy etc.

Hence, option B is correct

4 0

3 years ago

A motorist is driving at 20m/s when she sees that a traffic light 200m ahead has just turned red. She knows that this light stay

yuradex [85]

Answer:

5.71428571422 m/s

Explanation:

u = Initial velocity = 20 m/s

v = Final velocity

s = Displacement

a = Acceleration

Time taken = 15-1 = 14 s

Distance traveled in 1 second = $20\times 1=20\ m$

$s=ut+\frac{1}{2}at^2\\\Rightarrow 200-20=20\times 14+\frac{1}{2}\times a\times 14^2\\\Rightarrow a=\frac{2(180-20\times14)}{14^2}\\\Rightarrow a=-1.02040816327\ m/s^2$

$v=u+at\\\Rightarrow v=20-1.02040816327\times 14\\\Rightarrow v=5.71428571422\ m/s$

The speed as she reaches the light at the instant it turns green is 5.71428571422 m/s

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3 years ago

A passenger plane is flying above the ground.Describe the two components of its mechanical enserfy

Goryan [66]

The force and the air resistance depends on the mechanical enserfy.

3 0

3 years ago

Which of the following statements about digestion is/are TRUE? (Select all that apply.)

MArishka [77]

1st one and fourth one are true.

7 0

3 years ago

Read 2 more answers

A ship coming from sea enters the river ,with its hull sink more or less in river water?Give reasons.

GenaCL600 [577]

Explanation:

Hey, there!

Answer: It sinks more.

We know that the water of sea is salty in nature which increases the density of water in sea and donot let's ship sink but in condition of river water it doesn't have any effects of salty water as it doesn't contain salty water due to which it's density is no more than the densityof ship which let's it sink more than sea water.

Hope it helps...

5 0

3 years ago