1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
a_sh-v [17]
4 years ago
11

Blake and Sandra are having a rummage sale. Blake drags 3 boxes a distance of 10 meters each. He exerts a force of 20 newtons on

each box. Sandra drags 4 boxes a distance of 12 meters each. She exerts a force of 15 newtons on each box. Blake takes 2 minutes to complete his work. Sandra takes 4 minutes.
Blake does ____ work than Sandra. Blake’s power ____ is than Sandra’s power.

(Hint: Use W = Fd and P = w/t.)
Physics
2 answers:
vampirchik [111]4 years ago
5 0
For Blake:

3 boxes at a distance of 10 meters each, each box weighs 20 N

Work done by Blake = 3 * 10m * 20N
                                 = 600 J
Power = 600 J/ 2 min
           = 300 J/min

For Sandra:

4 boxes, 15 N each at a distance of 12 meters each. 

Work done by Sandra = 4 * 15 N *12m
                                    =  720 J
Power = 720 J/ 4 min
           = 180 J/min

Blake does less work than Sandra. 
Blake's power is more than Sandra's.
stiv31 [10]4 years ago
3 0

Answer:

Blake does  less  work than Sandra. Blake’s power is  

more  than Sandra’s power.

You might be interested in
The length of a vector is its_____
zlopas [31]

Answer:

The answer here would be its "Magnitude".

5 0
4 years ago
Read 2 more answers
Planet that has an orbit that intersects the orbit of pluto
Scilla [17]
<h2>Answer: Neptune </h2>

The dwarf planet Pluton, <u>has the most eccentric orbit</u> (more elliptical and elongated) of all the planets, and as a consequence its orbit is "intersected" by the orbit of Neptune.

However, <u>despite this intersection, there is no collision risk between these two bodies</u>, since the orbit of Pluto is located in an orbital plane different from that of the other planets and therefore different from that of Neptune, its nearest neighbor. In addition, the orbit of Pluton is inclined 17\° on the the ecliptic plane (plane where the other planets move around the Sun).

8 0
3 years ago
Which statement best describes a solid?
aksik [14]
Fixed shape and fixed volume

6 0
4 years ago
Read 2 more answers
The student applies a net force of 4.5 N to the 1.5 kg textbook.
Kitty [74]

Answer:

3 m/s²

Explanation:

acceleration = Force / mass;  4.5/1.5 = 3

4 0
3 years ago
A 2 kg ball is moving 3 m/s when it starts rolling up a hill.
AURORKA [14]

Answer:

the height reached is = 0.458 [m]

Explanation:

We need to make a sketch of the ball and see the location of the reference point where the potential energy is zero. But the kinetic energy will be defined by the following expression:

Ek=\frac{1}{2} *m*v^{2} \\where:Ek= kinetic energy [J]\\m = mass of the ball [kg]\\v = velocity of the ball [m/s]

Replacing the values on the equation we have:

Ek=\frac{1}{2}*(2)*(3^{2} )\\ Ek=9[J]\\

This kinetic energy will be transformed in potential energy in the moment when the ball starts to rolling up. Therefore the maximum height reached by the ball depends of the initial velocity given to the ball.

Ek=Ep\\where\\Ep=potential energy [J]\\Ep=m*g*h\\where\\g=gravity = 9.81[m/s^2]\\h=height reached [m]\\

Now we have:

h=\frac{Ep}{m*g} \\h=\frac{9}{2*9.81} \\\\h=0.45 [m]

In that moment when the ball reach the 0.45 [m] the potencial energy will be maximum and equal to the kinetic energy when the ball has a velocity of 3[m/s]

6 0
3 years ago
Other questions:
  • The area of the top side of a piece of sheet metal is given below. The sheet metal is submerged horizontally in 8 feet of water.
    15·1 answer
  • A simple pendulum is known to have a period, T = 1.55 s. Student A uses their smartphone stopwatch app to measure the total time
    14·1 answer
  • A rock is thrown vertically upward from the ground, with an initial velocity of 64 ft/sec. Its position function is s(t) = –16t2
    13·1 answer
  • Juan and Kuri are on a carousel. Juan is closer to the center of the carousel than Kuri. Which statement describes their tangent
    13·2 answers
  • If a star's parallax angle is too small to measure, what can you conclude about the star's distance from the Earth?
    10·1 answer
  • 100 kw of power is delivered to the other side of a city by a pair of power lines with the voltage difference of 13014.1 v.
    5·1 answer
  • Locomotion is the act of staying stationary. <br><br> True <br> False<br><br> 20 POINTS
    11·1 answer
  • How might scientists study something that they cannot observe directly?
    12·1 answer
  • What is the potential difference across lamp 1
    11·1 answer
  • The formulas used to analyze the horizontal and vertical motion of projectiles launched at an angle involve the use of which fun
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!