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
N76 [4]
3 years ago
5

To understand Newton's 1st law. Newton's Principia states this first law of motion: An object subject to no net force maintains

its state of motion, either at rest or at constant speed in a right line. This law may be stated as follows: If the sum of all forces acting on an object is zero, then the acceleration of that object is zero. Mathematically this is just a special case of the 2nd law of motion, F =ma , when F =0. When studying Newtonian mechanics, it is best to remember the 1st law in two ways: If the net force (i.e., sum of all forces) acting on an object is zero, the object will keep moving with constant velocity (which may be zero). If an object is moving with constant velocity, that is, with zero acceleration, then the net force acting on that object must be zero.
Part A
If a car is moving to the left with constant velocity, one can conclude that ?
(a) there must be no forces applied to the car.
(b) the net force applied to the car is directed to the left.
(c) the net force applied to the car is zero.
(d) there is exactly one force applied to the car.
Part B
An object cannot remain at rest unless

(a) there are no forces at all acting on it.
(b) the net force acting on it is zero.
(c) the net force acting on it is constant.
(d) there is only one force acting on it.
Part C

An object will have constant acceleration if?
(a)there are no forces at all acting on it.
(b)the net force acting on it is zero.
(c)the net force acting on it is constant in magnitude and direction.
(d)there is only one force acting on it.
Physics
1 answer:
Doss [256]3 years ago
7 0

Explanation:

Part A,

If a car is moving to the left with constant velocity, the change in velocity of the car is equal to zero. So the acceleration of the car is zero. As a result, the the net force applied to the car is zero.

So, the correct option is (c) "the net force applied to the car is zero".

Part B,

An object cannot remain at rest unless the net force acting on it is zero. This is Newton's first law of motion.

So, the correct option is (b).

Part C,

An object will have constant acceleration, the net force acting on it is constant in magnitude and direction. The net force acting on the object is directly proportional to its acceleration.

So, the correct option is (c).

Hence, this is the required solution.

You might be interested in
A balloon is filled at sea level on a spring day (temperature 20°C) to a volume of 0.500 m3 and then brought at op of Mount Ever
blagie [28]

Answer:

Volume increases

Explanation:

The balloon when filled at sea level being comparatively close to the center of the earth will have higher pressure due to the influence of gravity and when this balloon is taken to the top of the mountain being away from the center of earth, it will experience a lesser pressure due to low gravity where the amount of force exerted by the air on the object is lesser as compared to to that at the sea level.

Therefore, there will be an increase in volume of the balloon as there is expansion of air on the inside of the balloon as a result of low pressure.

There is not  much effect of temperature at both the sea level and the mountain top as the temperature does not impart any energy to the air molecules so as to decrease the volume.

Therefore,there is an increase in the volume of the balloon at the top of the mountain.

Percentage change in volume is given by:

% change = \farc{V - 0.5}{0.5}times 100

8 0
3 years ago
A person drops a pebble of mass m1 from a height h, and it hits the floor with kinetic energy KE. The person drops another pebbl
Leona [35]
<h2>Answer:</h2>

<em>Hello, </em>

<h3><u>QUESTION)</u></h3>

<em>✔ We have: KE = PE (potential energy) </em>

<em>PE = m x g x h </em>

The potential energy that the pebble of mass 1 has is called PE1 and the potential energy that the pebble of mass 2 has is called PE2  

PE1 = PE2 ⇔ PE1/PE2 = 1

\frac{m_1\times g\times h}{m_2\times g\times 4h} = 1 \\ \\  \frac{m_1}{m_2\times 4} = 1 \\ \\  \frac{m_1}{m_2} = 4

The mass m1 is therefore 4 times greater than that of the stone of mass m2.

 

8 0
2 years ago
Which statement best describes the energy of activation?
Varvara68 [4.7K]

hi <3

i believe the answer would be D, as when the temperature increases the particles have more energy and can overcome the activation energy more rapidly.

hope this helps :)

4 0
2 years ago
2 decaliters + 800 deciliters = __________ liters?
Stolb23 [73]
Answer is 100 liters
8 0
3 years ago
Read 2 more answers
Afootball of mass 550g is at rest on the ground the football is kicked with a force of 108 newton the footballers boot is in con
d1i1m1o1n [39]

If "0.3 minute" is correct, then it's 9,543,272 Joules.

If it's supposed to say "0.3 SECOND", then the KE is 2,651 Joules.

6 0
3 years ago
Other questions:
  • What is the advantage of D-step tuning on 2020 Pathfinder’s Xtronic CVT at cruising speed?
    10·1 answer
  • Which best describes what is made of matter?
    9·2 answers
  • 1. What will happen to the brightness of the light bulb if the switch in this circuit is suddenly closed?
    6·1 answer
  • What is the magnetic flux linkage, in units of Weber, for a coil of 360 turns and cross sectional area of 0.133 m^2 when the mag
    5·1 answer
  • A _________ is a satellite or other spacecraft designed to explore space and transmit data back to Earth.
    8·2 answers
  • An 80-kg skater is coasting at a velocity of 6 m/s. She sees a small child in her way and picks him up as she skates by. Her vel
    11·1 answer
  • Which statement is true:
    11·1 answer
  • Suppose one organ in the organ system failed to work properly, How would the organ system be affected? Would it still be able to
    7·1 answer
  • A volleyball that has an initial momentum of
    13·1 answer
  • Sort the sentences based on whether they describe the properties of a heterogeneous or a homogenous mixture.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!