A 20 N unbalanced force causes an object to accelerate at 1.5 m/s2. What is the mass of the object?

Physics

1 answer:

kicyunya [14]3 years ago

4 0

As per Newton's II law we know that

$F = ma$

here we know that

$F = 20 N$

$a = 1.5 m/s^2$

now the mass of the object will be given as

$m = \frac{F}{a}$

$m = \frac{20}{1.5}$

$m = 13.3 kg$

so mass of the object will be 13.3 kg

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ArbitrLikvidat [17]

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3 years ago

A sled is pulled with a horizontal force of 18 n along a level trail, and the acceleration is found to be 0.39 m/s2. an extra ma

Natali5045456 [20]

From Newton's second law of motion, it is identified that the net force applied to the object with mass m, will make it move with an acceleration of a. This can be mathematically translated as,
F = m x a
To solve for the mass of the sled, we derive the equation above such that,
m = F / a
Substituting,
m = (18 N) / (0.39 m/s²)
m = 46.15 kg

Then, we add to the calculated mass the mass of the extra material.
total mass = 46.15kg + 4.5 kg
total mass = 50.65 kg
We solve for the normal force of the surface to the object by calculating its weight.
F₂ = (50.65 kg)(9.8 m/s²)
F₂ = 496.41 N

The force that would allow barely a movement for the object is equal to the product of the normal force and the coefficient of kinetic friction.
F = (F₂)(c)
c = F/F₂

Substituting,
c = 18 N/496.41 N
c = 0.0362

<em>ANSWER: c = 0.0362</em>

5 0

3 years ago

a wooden block has a mass of 1.2 kg, a specific heat of 710, and is at a temperature of 25*C. what is the block's final temperat

mash [69]

The final temperature of the block is $27.5^{\circ} C$

Explanation:

The amount of thermal energy Q supplied to a substance is related to the increase in temperature of the substance, $\Delta T$ , according to the equation