A force is always required to move an object from rest
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Related Questions
Explain why increasing the temperature of a gas in a closed, rigid container causes the pressure in the container to increase.
Explain how does the geyser works?
A foot strikes the floor with a force of 520N at an angle of 20 degrees. what is the friction force exerted by the foot?
All organisms have adaptations. The list below describes how different adaptations might affect different species.A bird species that develops a longer beak would be able to extract insects from holes that are deep within trees. A plant species that develops the ability to excrete salt through the leaves of the plant could survive in soils that have high concentrations of salt. A rodent species that develops the ability to hibernate, or remain inactive during the winter months, would be able to conserve energy when little food is available. Which of the following is true?
• two cans (one quite small like a soup can and the other large, like a juice, can.)
Follow these steps:
A. Remove the top of each can. Punch a hole in the side of each can, very close to the bottom, making sure the holes are equal in size. Cover each hole with a piece of tape, and place the cans next to the sink.
B. Put water in both cans, making sure the water is at the same level - different amounts, but the same level. Turn the cans so the holes are facing into the sink, and remove the tape at the same time. Answer these questions: Do the streams of water shoot out at the same distance? Why or why not?
C. Try the same experiment, but this time put one cup of water in each can. What happens to the streams of water now?
D. Try the same experiment, but this time fill both cans to the top. What happens to the streams of water?
ANSWER A B C AND D CORRECTLY!!!
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the water flows faster out of a smaller can than it does a larger can.
Answer:
A&B: The stem of the water does not shoot out the same distance because one can have less water and the other can have more water and the can with less water have more pressure that making the can shoot out further than the can with more water.
C: Less water will come out of the two cans because they are compressed together so all of the water is trying to come out all at the same time.
D:All of the water in the can started coming out all in one small stream.
Explanation:
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As it is given that 2 kg mass is suspended by 12 cm long thread and then a horizontal force is applied on it so that it remains in equilibrium at 30 degree angle
So here we can use force balance in X and Y directions
now for X direction or horizontal direction we can use
for vertical direction similarly we can say
so here we first divide the two equations
now plug in all values in the above equation
Part b)
now in order to find the tension in the thread we can use any above equation
so tension in the thread will be 22.6 N
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the minimum amount of horizontal force that the man will need to apply so
that the tree will start moving?
A. 240 N
B. 360 N
C. 480 N
D. 120 N
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Answer:
120 N
Explanation: First we shoud consider the forces acted on a tree
Friction foce - acting opposite to the moving direction
Weight - Directly acting downwards
Reaction - Directly acting on upwards
For minimum required force should be equal to the friction force
F = μ R
F = 0.5×480
= 120N
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The mechanical advantage of a ramp that is 6.0 m long and 1.5 m tall. we can easily take any object to height of 6 m.
What is gravitational Potential Energy ?
Gravitational potential energy is an energy acquired by an object due to a change in its height when it is present in a gravitationalfield. It is denoted by P or U. and it its expressed in joule. Gravitational potential energy is given by U = mgh where m is the mass of the object, g is acceleration due to gravity and h is the height.
when we take an object of mass m to a certain height in the field of gravitation, we can say that body has potential energy and we release that body from that height, it falls.
Ramp of 6.0 m long and 1.5 m tall is that there will be angle made by the inclination is 14.4°. Mechanical advantage of a ramp is, it is used for transportation of heavy objects to a certain height at certain distance. It reduces physical efforts and make our task faster. when we have to transport lots of object to a certain height, when we put objects on the ramp which has motor and upper part of the belt rotates, it will easily get transported to that height without physical efforts. Escalator is also a type ramp. Ramp which has no rotator, we have to push objects on the ramp to that height.
Hence these are advantages of a ramp.
To know more about Ramp, click :
#SPJ3.
Answer: 4.0
Explanation:
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Answer:
What is a Pure Substance?
Explanation:
It is something which cannot be divided into parts by physical means, as it's all made up of the same thing. Pure substances are either elements or compounds. Elements can NOT be separated into other types of matter (physically or chemically).
Answer:
an element
Explanation:
Elements are not able to be separated, but everything else can, whether that be physically or chemically.
Not my work i looked it up, so no copy write please rate!