1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
cricket20 [7]
3 years ago
12

1. Distinguish between the relationship that

Physics
1 answer:
Allushta [10]3 years ago
7 0

1) a=\frac{v-u}{t}, F=ma

2) Net force is the vector sum of all forces acting on an object

3) The acceleration doubles

4) The acceleration halves

5) See definitions below

6) Newton's second law states that the net force acting on an object is equal to the product between the mass of the object and its acceleration (F=ma)

7) The force is 20 000 N

8) The force of friction is opposite to the direction of motion

9) The force applied is 100 N, the acceleration is zero, and the net force is zero

Explanation:

1)

The equation that defines acceleration is:

a=\frac{v-u}{t}

where

v is the final velocity

u is the initial velocity

t is the time

While the equation that states how acceleration is produced is Newton's second law of motion:

F=ma

where

F is the net force

m is the mass of the object

a is the acceleration

2)

The net force acting on an object is the sum of all the forces acting on the object. Since force is a vector, it is important to take into account the direction of the forces when calculating their (vector) sum.

The general procedure to calculate the net force is:

  1. First, we resolve each force along two perpendicular directions, generally x- and y-
  2. Then we find the x- and y- components of the net force by adding all the components along each direction
  3. Then we find the net force by using Pythagorean's theorem, F=\sqrt{F_x^2+F_y^2}

3)

We can answer by looking at Newton's second law:

F=ma

which can be rewritten as

a=\frac{F}{m}

We see that acceleration is directly proportional to the net force: so, if the net force is doubled (F' = 2F), the new acceleration is

a'=\frac{(2F)}{m}=2(\frac{F}{m})=2a

4)

As before, we can rewrite the acceleration from Newton's second law:

a=\frac{F}{m}

We see that acceleration is inversely proportional to the mass: so, if the mass is doubled (m' = 2m), the new acceleration is

a'=\frac{F}{(2m)}=\frac{1}{2}(\frac{F}{m})=\frac{a}{2}

So, the acceleration halves.

5)

  • Directly proportional: two variables are directly proportional if when one of the two increases, the other one increases too. An example is the acceleration and the net force in Newton's second law: as the force increases, the acceleration increases too
  • Inversely proportional: two variables are inversely proportional if when one of the two increases, the other one decreases. An example is the acceleration and the mass in Newton's second law: as the mass increases, the acceleration decreases

6)

Newton's second law states that the net force acting on an object is equal to the product between the mass of the object and its acceleration.

Mathematically, it is expressed by the equation:

F=ma

where:

F is the net force

m is the mass

a is the acceleration

7)

In order to solve this problem, we apply Newton's second law:

F=ma

where in this problem, we have:

m = 20,000 kg is the mass of the rocket

a=1 m/s^2 is its acceleration

Substituting in the equation, we find:

F=(20,000)(1)=20,000 N

8)

The force of friction is caused by the roughness of the surfaces: when an object slides on a surface, the two surfaces of contact are not perfectly smooth, but they are rough; therefore, these "micro-bumps" cause a force that "resists" the motion of the object.

Therefore, the direction of the force of friction is opposite to that of the motion of the object. For a flat surface, the force of friction is given by

F_f = \mu N

where \mu is the coefficient of friction and N the normal force on the object.

9)

Newton's second law is

F=ma

In this case, the net force is

F=F_a - F_f

where F_a is the applied force and F_f the  force of friction. We know that

F_f = 100 N

And that the object is at constant velocity, so

a=0

Which means that the net force is zero:

F_a - F_f = 0\\F_a = F_f = 100 N

So, the force applied is 100 N, the acceleration is zero, and the net force is zero.

Learn more about forces and Newton laws:

brainly.com/question/11411375

brainly.com/question/1971321

brainly.com/question/2286502

brainly.com/question/2562700

#LearnwithBrainly

You might be interested in
A golf ball is hit horizontally off the edge of a 30 m high cliff and lands a distance of 25 m from the edge of the cliff. What
Ratling [72]

Answer:

V₀y = 0 m/s

t = 2.47 s

V₀ₓ = 61.86 m/s

Vₓ = 61.86 m/s

Explanation:

Since, the ball is hit horizontally, there is no vertical component of velocity at initial point. So, the initial vertical velocity (V₀y) will beL

<u>V₀y = 0 m/s</u>

For the initial vertical velocity of golf ball we consider the vertical motion and apply 2nd equation of motion:

Y = V₀y*t + (0.5)gt²

where,

Y = Height = 30 m

g = 9.8 m/s²

t = time to hit the ground = ?

Therefore,

30 m = (0 m/s)(t) + (0.5)(9.8 m/s²)t²

t² = 30 m/4.9 m/s²

t = √6.122 s²

<u>t = 2.47 s</u>

For initial vertical velocity we analyze the horizontal motion of the ball. We neglect the frictional effects in horizontal motion thus the speed remains uniform. Hence,

V₀ₓ = Xt

where,

V₀ₓ = Initial vertical Velocity = ?

X = Horizontal Distance = 25 m

Therefore,

V₀ₓ = (25 m)(2.47 s)

<u>V₀ₓ = 61.86 m/s</u>

<u></u>

Due, to uniform motion in horizontal direction:

Final Vertical Velocity = Vₓ = V₀ₓ

Vₓ = 61.86 m/s

4 0
3 years ago
A capacitor is to be constructed to have a capacitance of 100uF.The area of the plates is 6.om by 0.030m and the relative permit
lara [203]

Answer:

The answer is below

Explanation:

Given that:

The area of the plates is 6 m by 0.030 m, Therefore the area = 6 m × 0.03 m =  0.18 m²

the relative permittivity of dielectric (εr) is 7.0

Permittivity of free space (εo) = 8.854 × 10^(-12)

capacitance of 100uF

potential difference (V) of 12V

d = separation between plate

The capacitance (C) of a capacitor is given by:

C=\frac{\epsilon_o \epsilon_r A }{d}\\ 100*10^{-6}=\frac{8.854*10^{-12}*7*0.18}{d}\\ d=\frac{8.854*10^{-12}*7*0.18}{100*10^{-6}}=1.11*10^{-7}\ m

The electric field between plates is given as:

E = V /d

E = 12 / 1.11*10^{-7}=10.75*10^7\ V/m

3 0
3 years ago
An 85 kg man and his 35 kg daughter are sitting on opposite ends of a 3.00 m see-saw. The see-saw is anchored in the center. If
wolverine [178]

Answer:

0.54m

Explanation:

Step one:

given data

length of seesaw= 3m

mass of man m1= 85kg

weight = mg

W1= 85*10= 850N

mass of daughter m2= 35kg

W2= 35*10= 350N

distance from the center= (1.5-0.2)= 1.3m

Step two:

we know that the sum of clockwise moment equals the anticlockwise moment

let the distance the must sit to balance the system be x

taking moment about the center of the system

350*1.3=850*x

455=850x

divide both sides by  850

x=455/850

x=0.54

Hence the man must sit 0.54m from the right to balance the system

3 0
3 years ago
A 1,200 kg dragster, starting from rest, reaches a maximum velocity of 140m/s in 5 seconds. At the 5 second mark, the dragster d
SSSSS [86.1K]

Answer:

Drag or air resistance

Explanation:

The force of friction caused by a moving fluid is called drag.  When that fluid is air, it's also known as air resistance.

8 0
3 years ago
In deep space, there is very little friction. Once they launch a probe into deep space, where there are no external forces actin
Charra [1.4K]

Answer:

move at constant velocity.

Explanation:

Newton's first law (also known as law of inertia) states that:

"when the net force acting on an object is zero, the object will keep its state of rest or if it is moving, it will continue moving at constant velocity".

In the case of the probe, friction in deep space is negligible, therefore when the engine is shut down, there are no more forces acting on the probe: the net force therefore will be zero, so the probe will move at constant velocity.

5 0
3 years ago
Read 2 more answers
Other questions:
  • A light beam shines through a slit and illuminates a distant screen. The central bright fringe on the screen is 1.00 cm wide, as
    7·1 answer
  • A particular grocery bag can withstand 40 N of tension force before it rips. If a shopper places 3 kg of food in the bag, what i
    9·2 answers
  • What happens to the speed of water waves as it enters a shallow medium .
    10·1 answer
  • What type of energy to high frequency waves have?
    14·1 answer
  • 3. Infer A car is travelling down a
    7·1 answer
  • Ms. PB is pushing Mr. Rigney in a wheelchair with a force of 10 N East, while Mr. Rigney is using his arms to
    9·1 answer
  • Help plsssssssssss I write it 100 time no one answer
    15·1 answer
  • Which is not an example of unbalanced force acting on an object
    6·1 answer
  • Gaya adalah...?? [tolong yaaa..]
    9·1 answer
  • A treasure chest full of silver and gold coins is being lifted from a pirate ship to the shore using two ropes as shown in the f
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!