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3 years ago

Newton's third law is applicable only to objects at rest. True False

2 answers:

8 0

Newton's third law applies even when objects do not move. Here a gymnast pushes downward on the bars. The bars push back on the gymnast with an equal force. an action-reaction pair is because one of the objects is often much more massive and appears to remain motionless when a force acts on it.

DiKsa [7]3 years ago

5 0

Answer:

False

Explanation:

Newton's third law - For every action there's an equal and opposite reaction, action and reaction act on different objects

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A ball is thrown vertically upward with a speed of 1.86

Inessa05 [86]

Answer:

t = 1.09 s.

Explanation:

This is a one-dimensional kinematics question, so the equations of kinematics will be sufficient to solve the question.

$y-y_0 = v_0t + \frac{1}{2}at^2\\0 - 3.82 = 1.86t +\frac{1}{2}(-9.8)t^2\\-3.82 = 1.86t - \frac{1}{2}9.8t^2\\4.9t^2 - 1.86t - 3.82 = 0$

This quadratic equation can be solved using determinant.

$\Delta = b^2 - 4ac\\t_{1,2} = \frac{-b \pm \sqrt{\Delta} }{2a}\\t_1 = 1.09~s\\t_2 = -0.71~s$

Of course, we will choose the positive time.

4 0

3 years ago

A roller coaster is going through a loop with a circular radius of 9.1 meters, how fast must the roller coaster be moving at the

Verdich [7]

Answer:

at least 20mph

Explanation:

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3 years ago

A 50 kg wagon is pulled with a 100 N force. If the force is increased to 200 N, how quickly will the wagon accelerate? 1 m/s2 2

Katen [24]

4 m/s2

I hope this helps!

3 0

3 years ago

Read 2 more answers

Please help for both of these

ra1l [238]

Answer:question 5: 2

Explanation:

5 0

3 years ago

Choose the option that correctly fills in the blanks: Magnetic fields point from ___ poles toward ___ poles.

ElenaW [278]

Magnetic fields point from north poles toward south poles.

<u>Explanation:</u>

A magnetic compass doesn't highlight the geographic north pole. A magnetic compass focuses on the earth's magnetic poles, which are not equivalent to earth's geographic poles.

About magnets, opposite poles attract each other. This reality infers that the north finish of a magnet in a compass is pulled in toward the south attractive posts, which lies close to the geographic north shaft. Attractive field lines outside of a lasting magnet reliably run from the north attractive shaft toward the south attractive post.

6 0

3 years ago