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jeka57 [31]
3 years ago
12

Which is the best example of Newton's Second Law of Motion? (1 point) Select one: a. A student has on roller skates and she deci

des to push against the railing. She immediately begins to roll backwards. b. A small, lightweight ball and a large, heavy ball are dropped off of a roof. They both strike the ground at the same time. c. A baseball player hits a baseball that is pitched to him. The ball immediately soars back in the direction of the pitcher. d. You are riding in a car that makes a quick right turn. You immediately slide across the back seat.
Physics
1 answer:
slava [35]3 years ago
4 0
D, I believe is the correct answer. Hope I answered your question, have a good day.<span />
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A dog is 60m away while moving at constant velocity of 10m/s towards you. Where is the dog after 4 seconds?
evablogger [386]
20m away

the dog was 60m away from. you subtract 40m since it is 10m/s x 4 seconds
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3 years ago
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Two astronauts of mass 100 kg are 2 m apart in outer space. What is the
fredd [130]

The force of gravity between the astronauts is 1.67\cdot 10^{-7}N

Explanation:

The magnitude of the gravitational force between two objects is given by:

F=G\frac{m_1 m_2}{r^2}

where :

G=6.67\cdot 10^{-11} m^3 kg^{-1}s^{-2} is the gravitational constant

m_1, m_2 are the masses of the two objects

r is the separation between them

In this problem, we have two astronauts, whose masses are:

m_1 = 100 kg\\m_2 = 100 kg

While the separation between the astronauts is

r = 2 m

Substituting into the equation, we can find the gravitational force between the two astronauts:

F=\frac{(6.67\cdot 10^{-11})(100)(100)}{2^2}=1.67\cdot 10^{-7}N

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3 years ago
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Could anyone can help me for this question I don’t understand how I can do?!! Please it really important!!
stiv31 [10]
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4 years ago
A rising pendulum bob gains _____ energy.
puteri [66]

Answer:

B. Kinetic energy.............

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3 years ago
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A block with a mass of 2kg is pushed 20cm and a constant speed up an incline that makes a 40 degree angle with the floor. how mu
Alexxx [7]

work done will be 2.5872 J

Given :

mass of block = 2kg

distance travelled by block = 20cm

angle of inclination = 40°

To Find :

Work done by gravity

Solution :

Gravity is defined as the force that attracts a body towards the earth or towards any other physical body having mass.

work done by gravity is mgh

If θ is the angle made when the body falls, the work done by gravity is given by,

W = m g h cosθ

W = 2 x 9.8 x 0.2 x cos40°

= 2.5872 J

So work done will be 2.5872 J

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