Physics, 29.08.2019 01:30 avision42

Aconstant force is applied to an object, causing the object to
accelerate at 8.0 m/s2. what will the acceleration be if
a. the force is doubled?
b. the object’s mass is doubled?
c. the force and the object’s mass are both doubled?

Answers: 1

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Answers

Answer from: lindalu

The acceleration of the object if

a. The force is doubled → a = 16 m/s²

b. The object’s mass is doubled → a = 4 m/s²

c. The force and the object’s mass are both doubled → a = 8 m/s²

Further explanation

Newton's second law of motion states that the resultant force applied to an object is directly proportional to the mass and acceleration of the object.

$\large {\boxed {F = ma}$

F = Force ( Newton )

m = Object's Mass ( kg )

a = Acceleration ( m )

Let us now tackle the problem!

Given:

a₁ = 8 m/s²

Question A:

The force is doubled → F₂ = 2F₁

F_1 : F_2 = ma_1 : ma_2

F_1 : F_2 = a_1 : a_2

F_1 : 2F_1 = 8 : a_2

1 : 2 = 8 : a_2

$a_2 = 8 \times 2$

$\boxed {a_2 = 16 ~ m/s^2}$

Question B:

The object’s mass is doubled → m₂ = 2m₁

F_1 : F_2 = m_1a_1 : m_2a_2

F_1 : F_1 = m_1a_1 : 2m_1a_2

1 : 1 = 1a_1 : 2a_2

1 : 1 = 1(8) : 2a_2

2a_2 = 8

$a_2 = 8 \div 2$

$\boxed {a_2 = 4 ~ m/s^2}$

Question C:

The force and the object’s mass are both doubled → F₂ = 2F₁ , m₂ = 2m₁

F_1 : F_2 = m_1a_1 : m_2a_2

F_1 : 2F_1 = m_1a_1 : 2m_1a_2

1 : 2 = a_1 : 2a_2

1 : 2 = 8 : 2a_2

$2a_2 = 8 \times 2$

2a_2 = 16

$a_2 = 16 \div 2$

$\boxed {a_2 = 8 ~ m/s^2}$

Learn moreImpacts of Gravity : linkEffect of Earth’s Gravity on Objects : linkThe Acceleration Due To Gravity : linkNewton's Law of Motion: linkExample of Newton's Law: linkAnswer details

Grade: High School

Subject: Physics

Chapter: Dynamics

Keywords: Gravity , Unit , Magnitude , Attraction , Distance , Mass , Newton , Law , Gravitational , Constant

Answer from: Quest

1.the balanced chemical equation is as below

cu + 2 ag(no)₃ → cu(no₃)₂ +2 ag

2.the much silver produced is 50.9 g

step 1: find the moles of cu

moles = mass÷ molar mass

from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236 moles

step 2: use the mole ratio to determine the moles of ag

from equation above cu: ag is 1: 2

therefore the moles of ag =0.236 moles x 2/1 =0.472 moles

step 3: find the mass of ag

mass = moles x molar mass

from periodic table the molar mass of ag =107.87 g/mol

mass = 0.472 moles x 107.87 g/mol = 50.9 g

3. the much silver collected worth is 1.797 oz

convert 50.9 g to oz

that is 1 gram = 0.0353 oz

50.9 grams =? oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1 gram} =1.797 oz

Answer from: Quest

Answer

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

explanation

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

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Aconstant force is applied to an object, causing the object to
accelerate at 8.0 m/s2. what wi...