if an object is moving at a constant speed in one direction, what is needed to change its speed or direction?.
Answers
Force is needed to change the speed or direction of an object moving at a constant speed.
We have an object is moving at a constant speed in one direction.
We have to determine what is needed to change its speed or direction.
Is Speed scalar or vector quantity ?
Speed is a scalar quantity as it has only magnitude and no direction.
According to the question, we have -
An object is moving at a constant speed in one direction. Now in order to change its speed or direction we need something to change its current state in which it is moving with constant speed in one direction. According to Newton's first law of motion, any body continues to be in its current state, unless some external force is applied on it. Hence, a certain amount of Force is needed in order to change its speed or direction.
Hence, Force is needed to change the speed or direction of an object moving at a constant speed.
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Any considerable amount of force is needed to change the speed of an object, if it is moving with constant speed in one direction. If the force applied is in the same direction in which an object is moving, speed of the object will increase. If force is in opposite direction of the motion, speed of object will decrease. If force is always perpendicular to the direction of motion of an object, it will move in a circle.
Further explanation:
Newton’s first law states that an object will remain in its initial state of the motion until and unless an external force is applied on the object. It means, object will remain in motion if it was in motion and it will remain at rest if it was initially at rest until and unless an external force is applied on the object.
Given:
An object is moving at a constant speed in one direction.
Concept:
Acceleration is defined as the rate of change of velocity with respect to time. Acceleration will be zero if change in the velocity with time is zero.
We know that velocity is a vector quantity because it has magnitude as well as the direction.
In the question object is moving in one direction, therefore direction is not changing with time, and also the magnitude of the velocity of an object is constant. So the acceleration of the object is zero.
Acceleration is caused due to the force. If all the forces on the object are in equilibrium, the net force on the object will be zero and acceleration of object will also be zero.
Now if we want to change the speed or direction of the object, it is needed to exert an external force on the object. If a net force is exerted on the object, it will be subjected to an acceleration which causes change in speed or change of direction of the object.
Thus, any considerable amount of external force is needed to change the speed or direction of the object.
Learn More:
1. A 30kg block being pulled across a carpeted floor brainly.com/question/7031524
2. Net force acting on a 200kg refrigerator brainly.com/question/7031524
3. Max and Maya are riding on a merry-go-round brainly.com/question/8444623
Answer Details:
Grade: High School
Subject: Physics
Chapter: Laws of motion
Keywords:
Object, moving, constant, speed, one, direction, needed, change, speed, direction, considerable, force, acceleration, zero acceleration.
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Answers
That's why ice cubes float in liquid water, and the reason that pipes
or cans of soda spring leaks when the liquid water that they're full of
freezes and gets bigger.
Answers
Answer:
The depth is 68.4 meters.
Explanation:
In this question the whale rose to the surface of the ocean to breath and then dives into the ocean at an angle of 20° below the horizontal line. It then travels 200 m straight along this line. We have to determine the depth of the ocean.
The path of the whale forms the hypotenuse of a right triangle and the angle between the hypotenuse and base is given as 20°. Determination of sides or angles in a right triangle can be determines using trigonometry.
sinθ =
opposite side = sinθ
Here θ = 20°
sinθ = sin(20°) = 0.342
opposite side=
Hence the depth is 68.4 m.
Answer:
It is 68.404 m deep.
Explanation:
The motion of the whale can be seen in the form of a right-angle triangle.
Angle of deviation = 20°
We know that, sinФ = Perpendicular/ Hypotenuse.
Here, hypotenuse = 200 m
Depth is perpendicular that we have to find.
sin(20°) = Depth/200
Depth = sin(20°) * 200 = 68.404 meters.
Answers
A 5.0 kg object is pulled by a 15-N force acting 20 °C above the horizontal. After moving for 6.0 m, the work done is 85 J.
What is work?
In physics, work is the energy transferred to or from an object via the application of force along a displacement.
A 5.0 kg object is pulled by a 15-N force acting 20 ° above the horizontal. We can calculate the work done after the object moved 6.0 m using the following expression.
W = F × s × cosθ
W = 15 N × 6.0 m × cos 20° = 85 J
where,
- W is the work.
- F is the force.
- s is the displacement.
- θ is the angle between F and s.
A 5.0 kg object is pulled by a 15-N force acting 20 °C above the horizontal. After moving for 6.0 m, the work done is 85 J.
Learn more about work here: brainly.com/question/62183
Answer:
84.6 J
Explanation:
The work done by the force is given by
where
W is the work done
F = 15 N is the force applied
d = 6.0 m is the displacement
is the angle between the force's direction and the displacement
Substituting the numbers into the equation, we find
Gram
Meter
Pound
Answers
Among the option given below, the most appropriate SI base unit for measuring mass is Gram. Thus, the correct option is B.
What is an SI unit?
An SI unit may be defined as a form of the metric system that is utilized universally as a standard for measurements. It is an international system of units. The expanded form of the SI unit is Systeme International.
The exact SI base unit for measuring mass is the kilogram, kg. But it is not mentioned in the options. So, the most appropriate SI base unit for measuring mass is Gram.
Ampere is the SI base unit for measuring the electric current. A Meter (m) is the SI base unit for measuring length. A Pound is the international standard symbol used as a unit of mass and i.e. lb.
Therefore, among the option given below, the most appropriate SI base unit for measuring mass is Gram. Thus, the correct option is B.
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But that isn't the SI base unit of mass.
The base unit is the kilogram.
force constant (spring constant) of the spring?
A) 39 N/m
B) 22 N/m
C) 46 N/m
D) 31 N/m