To apply the same force as the person, the brother have to sit at a distance of 5 m.
What is meant by torque ?
Torque is defined as the rotational analogue of force. It is the cross product of force and the displacement of the object.
Here,
Mass of the person, m₁ = 50 kg
Mass of the brother, m₂ = 20 kg
Distance of the person, d₁ = 2 m
For the see-saw to get balanced, the torque applied by the two persons each side must be equal.
τ₁ = τ₂
where τ₁ is the torque applied by the person and τ₂ is that applied by the brother.
So, F₁d₁ = F₂d₂
m₁g x d₁ = m₂g x d₂
m₁d₁ = m₂d₂
Therefore, distance of the brother,
d₂ = m₁d₁/m₂
d₂ = 50 x 2/20
d₂ = 5 m
Hence,
To apply the same force as the person, the brother have to sit at a distance of 5 m.
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Answer:
5
Explanation:
with a 4.63 N force at a 63.0° angle.
What is the force of friction on the
toy?
(Hint: You do NOT need to know the
coefficient of friction.)
The force of friction on the toy is 2.10 N and it acts opposite to the direction of its motion.
A force called friction prevents one solid object from rolling or sliding over another. Although frictional forces, such the traction required to walk without slipping, may be advantageous, they can provide a significant amount of resistance to motion.
Given parameters:
mass of the toy dog: M = 0.398 kg.
Applied force: F = 4.63 N.
Angle of application of force: θ = 63.0°
Hence, horizontal component of applied force = F cosθ
= 4.63 × cos63.0° N
= 2.10 N.
As the child drags a 0.398 kg toy dog across flat ground at constant speed, this component of applied force is nullified by force of friction.
Hence, the force of friction on the toy is 2.10 N and it acts opposite to the direction of its motion.
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Answer:
-2.1 N
Explanation:
Answer:
When you burn 1 carbon, 2 atoms of oxygen will react with the carbon which forms carbon dioxide with 3 atoms. The law conservation applies since it states that mass can never be created nor destroyed. In simple terms, the amount used for the reaction should be the same amount produced.
Answer:
B and D
High Accuracy
Low precision
Explanation:
Its attached below!
Answer:
2780 meters
Explanation:
First, convert km/hr to m/s.
87.1 km/hr × (1000 m / km) × (1 hr / 3600 s) = 24.2 m/s
160.0 km/hr × (1000 m / km) × (1 hr / 3600 s) = 44.4 m/s
Given:
v₀ = 24.2 m/s
v = 44.4 m/s
a = 0.250 m/s²
Find: x
v² = v₀² + 2a (x − x₀)
(44.4 m/s)² = (24.2 m/s)² + 2(0.250 m/s²) (x − 0 m)
x = 2780 m
B-All radios and televisions should be switched off
C-People should rush to the highest floor of their houses
D-All doors and windows should be kept open for easy exit.
Answer:
people should stay indoors and seek shelter
Explanation:
Answer:
the answer is a. People should stay indoors and seek shelter.