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3 years ago

Pushing a baby on a swing is easier than pushing an adult on the same swing.

Physics

2 answers:

Shalnov [3]3 years ago

7 0

Answer:

Law 2:

Pushing a baby on a swing is easier than pushing an adult on the same swing. Water spills from a glass carried by someone who is walking steadily and suddenly stops short.

Law 2:

When thrown with the same force, a soccer ball accelerates more than a bowling ball.

Law 1:

A magician pulls a tablecloth out from under a dish on a table without disturbing the dish.

Law 3:

A rocket launches into space, pushing fuel exhaust in one direction and the rocket in the opposite direction.

Law 1:

A book rests on top of a shelf and does not move until a student accidentally knocks it off.

Explanation:

Newton's laws of motion:

Law 1: Law of inertia

Law 2: Law of force (F = mass x acceleration)

Law 3: Law of Action & Reaction

Sergeeva-Olga [200]3 years ago

5 0

Answer:

what is the question though

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In an attempt to reduce the extraordinarily long travel times for voyaging to distant stars, some people have suggested travelin

alexandr402 [8]

Answer:

a) $v=0.999124c$

b) $E=7.566*10^{22}$

c) $E_a=760 times\ larger$

Explanation:

From the question we are told that

Distance to Betelgeuse $d_b=430ly$

Mass of Rocket $M_r=20000$

Total Time in years traveled $T_d=36years$

Total energy used by the United States in the year 2000 $E_{2000}=1.0*10^20$

Generally the equation of speed of rocket v mathematically given by

$v=\frac{2d}{\triangle t}$

$v=860ly/ \triangle t$

where

$\triangle t=\frac{\triangle t'}{(\sqrt{1-860/ \triangle t)^2}}$

$\triangle t=\frac{36}{(\sqrt{1-860/ \triangle t)^2}}$

$\triangle t=\sqrt{(860)^2+(36)^2}$

$\triangle t=860.7532$

Therefore

$v=\frac{860ly}{ 860.7532}$

$v=0.999124c$

Generally the equation of the energy E required to attain prior speed mathematically given by

$E=\frac{1}{\sqrt{1-(v/c)^2} }-1(20000kg)(3*10^8m/s)^2$

$E=7.566*10^{22}$

c)Generally the equation of the energy $E_a$ required to accelerate the rocket mathematically given by

$E_a=\frac{E}{E_{2000}}$

$E_a=\frac{7.566*10^{22}}{1.0*10^{20}}$

$E_a=760 times\ larger$

8 0

3 years ago

What differentiates baseline activities from health-enhancing activities?

gizmo_the_mogwai [7]

The main difference between baseline activities and health-enhancing activities is that baseline activities maintain the status quo, while health-enhancing activities make things better.

8 0

3 years ago

Read 2 more answers

What are the factors affecting gravitational force?

oee [108]

Answer:
Distance between objects
Mass of objects
Force of gravitational field

6 0

4 years ago

A boy is standing in the middle of a field when his friend sprints past him with a speed of 4 m/s. At the moment his friend pass

algol13

Answer:

Explanation:

1) ½(0.8)t² = 4t

0.4t² = 4t

0.4t = 4

t = 10 s

2) d = vt = 4(10) = 40 m

d = ½atⁿ = ½(0.8)10² = 40 m

3) v = at = 0.8(10) = 8 m/s

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3 years ago

Emotional Intelligence includes:

vazorg [7]

Answer: True

Explanation

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3 years ago