PHYSICS HIGH SCHOOL

Range of motion is the distance an object can travel when separated from another object.a. True
b. False

Answers

Answer 1
Answer:

Answer:

false

Explanation:
Answer 2
Answer:

i chose false when i was taking my practice exam

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A construction worker pushes a wheelbarrow 5.0 m with a horizontal force of 50.0 N. How much work is done by the worker on the wheelbarrow

Answers

The work done will be "250 J".

According to the question,

  • Force, F = 50 N
  • Distance, d = 5 m

The work done is:

→ Work \ done = Force* Distance

or,

→                W = F* D

By substituting the values, we get

                      = 50* 5

                      = 250 \ J

Thus the above response is correct.  

Learn more about work done here:

brainly.com/question/21386378
Work Done = force • distance
Work Done = 5m • 50N
Work Done = 250J

Answer: 250 Joules

a 42.3 kg girl and a 7.93 kg sled are on the surface of a frozen lake, 15.0m apart and linked by a rope, but not moving yet. then the girl pulls on the rope, exerting a 5.76 N force on the sled, pulling it toward her. how far from the girl's original position do they meet?

Answers

Answer:

they meet from the girl's original position at: 2.37 (meters)

Explanation:

We need to use the Newton's law, exactly the second law that relate force, mass and acceleration as: F=m*a with this we can get both accelerations; solving for acceleration a=(F)/(m). Now a_(girl)=(5.76)/(42.3)=0.14 (m/s^(2)) anda_(sled)=(5.76)/(7.93)=0.73(m/s^(2)). Then knowing that they both travel at the same time and assuming that the distance among the girl and the sled is: 15.0-x, so, x=(1)/(2)*a_(girl)*t^(2) and15.0-x=(1)/(2)*a_(sled)*t^(2), solving for the time we get:t=\sqrt{(2x)/(a_(girl) ) } and t=\sqrt{(2*(15.0-x))/(a_(sled) ) } with this equations we solving for the x that is the distance between the girl and the sled after the apply the force and we get:\sqrt{(2x)/(a_(girl))} = \sqrt{(2*(15.0-x))/(a_(sled) ). Finally we get:(x)/(a_(girl) )=((15.0-x))/(a_(sled) ) and replacing the values we have got:(x)/(0.14) =((15.0-x))/(0.73) so 5.33*x=15-x so x=2.37 (meters).

What type of reaction occurs in the cores of stars to create their tremendous amounts of energy?a. fusion
b. fission
c. physical
d. chemical

Answers

The correct answer is A.

Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells. What is the BEST explanation of the relationship between wavelength and wave energy?

Answers

Answer : There exist an inverse relationship between the wavelength and the energy of the wave.

Explanation :

Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells.

The energy of a wave is given by the following relation :

E=(hc)/(\lambda)

So, it is clear that relation between the wavelength and the energy of the wave is inverse.

Higher the wavelength, least will be the energy of the wave.

The shorter the wavelength, the higher the frequency and the higher the energy.

Two physics students, Ben and Bonnie, are in the weightlifting room. Bonnie lifts the 50 kg barbell over her head (approximately .60 m) 10 times in one minute; Ben lifts the 50 kg barbell the same distance over his head 10 times in 10 seconds. Which student does the most work? Which student delivers the most power? Explain your answers.

Answers

Final answer:

Both students do the same amount of work, but Ben delivers more power due to completing the work in a shorter time.

Explanation:

In this case, both Ben and Bonnie are lifting the same 50 kg barbell over their heads, but they are doing it at different rates. Bonnie lifts the barbell 10 times in one minute, which means she is doing the work over a longer period of time. Ben, on the other hand, lifts the barbell 10 times in 10 seconds, doing the work in a shorter amount of time.

The amount of work done is equal to the force exerted multiplied by the distance moved. Since the mass and distance are the same for both students, the work done is equal. However, power is defined as the rate at which work is done, which is calculated by dividing the work done by the time taken to do it. Since Ben completes the work in a shorter period of time, he delivers more power than Bonnie.

Therefore, Ben does the most work and delivers the most power.

Learn more about Work and Power here:

brainly.com/question/3854047

#SPJ2

Answer:

Both of them

Explanation:

Which force is always pulling but never pushes and is directly influenced by mass

Answers

Answer: I know when it comes to magnetic objects the magnet always pulls not push.

Answer:

i believe it is gravity

Explanation:

the gravitational force is a force that attracts any two objects with mass. it pulls things together does not pushes them.
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