Blocks with masses of 3.0 kg, 4.0 kg, and 5.0 kg are lined up in a row on a frictionless table. All three are pushed forward by a 16 N force applied to the 3.0 kg block. How much force does the 4.0 kg block exert on the 5.0 kg block?
Answers
Answer:
2019?
Explanation:
Answer:
6.7 N
Explanation:
The force exerted by the 4.0 kg block on the 5.0 kg block will be 6.7
Fnet = 16 N (since it is applied only to the 3.0 kg block)
Total mass of the system, m = 3.0 kg + 4.0 kg + 5.0 kg = 12.0 kg
Fnet = ma16 = 12aSolving for a,a = 16/12 = 4/3 m/s²
m is the mass of the 5.0 kg block and a is the acceleration of the system.F = 5.0 kg x 4/3 m/s² = 6.666 N
Therefore, the force exerted by the 4.0 kg block on the 5.0 kg block is 6.7 N.
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A charged particle creates a(n) _____________field. Once this particle is in motion, this creates a(n) ____________ field.
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Answers
despite experiencing a 60N drag. Neglect any friction
impeding her motion.
How many forces are acting on the bicyclist?
What is the magnitude of the net force on the bicyclist?
How much force is the bicyclist generating through her
pedaling?
Answers
a) 4 forces
b) 186 N
c) 246 N
Explanation:
a)
Let's count the forces acting on the bicylist:
1) Weight (): this is the gravitational force exerted on the bicyclist by the Earth, which pulls the bicyclist towards the Earth's centre; so, this force acts downward (m = mass of the bicyclist, g = acceleration due to gravity)
2) Normal reaction (N): this is the reaction force exerted by the road on the bicyclist. This force acts vertically upward, and it balances the weight, so its magnitude is equal to the weight of the bicyclist, and its direction is opposite
3) Applied force (): this is the force exerted by the bicylicist to push the bike forward. Its direction is forward
4) Air drag (): this is the force exerted by the air on the bicyclist and resisting the motion of the bike; its direction is opposite to the motion of the bike, so it is in the backward direction
So, we have 4 forces in total.
b)
Here we can find the net force on the bicyclist by using Newton's second law of motion, which states that the net force acting on a body is equal to the product between the mass of the body and its acceleration:
where
is the net force
m is the mass of the body
a is its acceleration
In this problem we have:
m = 60 kg is the mass of the bicyclist
is its acceleration
Substituting, we find the net force on the bicyclist:
c)
We can write the net force acting on the bicyclist in the horizontal direction as the resultant of the two forces acting along this direction, so:
where:
is the net force
is the applied force (forward)
is the air drag (backward)
In this problem we have:
is the net force (found in part b)
is the magnitude of the air drag
Solving for , we find the force produced by the bicyclist while pedaling:
Answers
Answers
B. water
C. smoke
D. ice
Answers
The gaseous state of a liquid is called as vapor under normal conditions of temperature and pressure.
Answer: Option A
Explanation:
Vapor is a form of substance floating in air where increasing or decreasing the temperature and pressure changes the state of the substance into gas or liquid.
For example : consider water where heating it to the boiling point makes it as water vapor and reducing its temperature makes it as ice.
Under normal conditions of temperature and pressure, the gaseous state of a liquid is called vapor. The correct answer is A.
When a liquid is heated or its pressure is reduced, the kinetic energy of its molecules increases, causing them to gain enough energy to overcome intermolecular forces and transition into the gaseous state. This gaseous form of a substance, while retaining the same chemical composition as the liquid, is called vapor.
Let's examine why the other options are not true:
B. Water: Water specifically refers to the liquid state of H2O molecules. While water can exist as a liquid, solid (ice), or gas (water vapor), under normal conditions, the gaseous state of a liquid is referred to as vapor rather than water.
C. Smoke: Smoke is not the gaseous state of a liquid. It typically consists of tiny solid particles or liquid droplets suspended in the air, resulting from the incomplete combustion of organic matter. Smoke is not directly related to the gaseous state of a liquid substance.
D. Ice: Ice refers to the solid state of water. It is the result of the cooling and freezing of liquid water molecules. Ice is not related to the gaseous state of a liquid substance.
Therefore, under normal conditions of temperature and pressure, the gaseous state of a liquid is called vapor. While water refers to the liquid state, smoke is not directly related, and ice represents the solid state of a liquid substance.
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