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8090 [49]
3 years ago
11

6. Jim wishes to push a 100. N wood crate across a wood floor.What is the minimum horizontal force that would be required to sta

rt the crate moving?
Physics
2 answers:
sergejj [24]3 years ago
7 0
I want to say the answer is 42N
Usimov [2.4K]3 years ago
5 0

Answer:

50 N

Explanation:

The minimum horizontal force required to start the crate moving must be equal to the maximum force of static friction that acts between the floor and the crate.

The maximum force of static friction is given by:

F_f = \mu N

where

\mu is the coefficient of static friction

N is the normal reaction exerted by the floor on the crate.

For wood-wood, as in this case, the maximum coefficient of static friction is about \mu=0.5.

For a horizontal surface, the normal reaction is equal to the weight of the object, so in this case N=100 N. Therefore, the minimum horizontal force required will be:

F=F_f = \mu N=(0.5)(100 N)=50 N

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A kickoff sends a football with an initial velocity of 25 m/s at an angle of 50
eduard

Answer:

The x-component of the velocity is 16.07 m/s

The y-component of the velocity is 19.15 m/s

Explanation:

Given;

initial velocity of the football, u = 25 m/s

angle of projection, θ = 50⁰

The x-component of the velocity (horizontal component) is given as;

V_x = Vcos(50^0)\\\\V_x = 25 \ m/s \ \ \times \ \ 0.6428\\\\V_x = 16.07 \ m/s

The y-component of the velocity (vertical component) is given as;

V_y = Vsin(50^0)\\\\V_y = 25 \ m/s \ \ \times \ \ 0.766\\\\V_y = 19.15 \ m/s

7 0
2 years ago
How many atoms are there
yuradex [85]

Answer:

10^80 i think, scientists say so.

Explanation:

i pretty much just need points and i'm pretty sure you can look this up

4 0
2 years ago
The condition required to work to be done​
Dvinal [7]

Answer:

work=f(costheta)

Explanation:

work is done when a force acts on a body and displaces it on the direction of force

6 0
2 years ago
Which of the following to all food chains depend on in an ecosystem
Gre4nikov [31]

Answer:

The sun is the ultimate source of energy for all food chains. Through the process of photosynthesis, plants use light energy from the sun to make food energy. Energy flows, or is transferred through the system as one organism consumes another.

8 0
2 years ago
A stone that is thrown vertically upwards was having a velocity of 15m/s after reaches 2/3 of its maximum height. What is the ma
attashe74 [19]

<em>The correct answer is option</em><em> B.</em> The maximum height that can be reached by the stone is determined as 11.5 m.

<h3>Maximum height attained by the stone </h3>

The maximum height attained by the stone when it is a 2/3 of its total height is calculated as follows;

v² = u² - 2gh

where;

  • v is final velocity at maximum height, v = 0
  • u is initial velocity
  • g is acceleration due to gravity

0 =  u² - 2gh

2gh =  u²

h =  u²/2g

h = (15²)/(2 x 9.8)

h = 11.48 m

h = 11.5 m

Thus, the maximum height that can be reached by the stone is determined as 11.5 m

Learn more about maximum height here: brainly.com/question/12446886

#SPJ1

4 0
2 years ago
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