The rate at which an object changes its position over time, including both magnitude and direction, is defined as its velocity.
Missing Word
velocity
Velocity is a vector quantity that describes the rate of change of an object's position.
Question 2
An object undergoing constant acceleration will have its speed change by equal amounts in equal time intervals.
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acceleration
Acceleration is the rate at which an object's velocity changes over time.
Question 3
The total path length covered by a moving object, regardless of direction, is its distance.
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distance
Distance is a scalar quantity representing the total extent of an object's movement.
Question 4
According to Newton's first law, an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force, illustrating the principle of inertia.
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inertia
Inertia is the tendency of an object to resist changes in its state of motion.
Question 5
Newton's second law states that the net force acting on an object is equal to the product of its mass and acceleration.
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force
Newton's second law, F=ma, directly relates net force to mass and acceleration.
Question 6
For every action, there is an equal and opposite reaction, which is the statement of Newton's third law.
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reaction
Newton's third law describes the paired nature of forces between two interacting objects.
Question 7
The force that opposes the relative motion or tendency of motion between two surfaces in contact is known as friction.
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friction
Friction is a resistive force that arises from the interaction between surfaces.
Question 8
When a force causes a displacement of an object in the direction of the force, work is done on the object.
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work
Work is a scalar quantity defined as the product of the force and the displacement in the direction of the force.
Question 9
The energy an object possesses due to its motion is called kinetic energy.
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kinetic
Kinetic energy is directly proportional to an object's mass and the square of its speed.
Question 10
Gravitational potential energy depends on an object's mass, the acceleration due to gravity, and its height above a reference point.
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potential
Potential energy is stored energy that depends on the relative position of an object.
Question 11
The rate at which work is done or energy is transferred is defined as power.
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power
Power is a measure of how quickly energy is converted or transferred.
Question 12
In a closed system where only conservative forces do work, the total mechanical energy remains conserved.
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conserved
The principle of conservation of mechanical energy states that the sum of kinetic and potential energy remains constant in such a system.
Question 13
The product of an object's mass and its velocity is defined as its linear momentum.
Missing Word
momentum
Momentum is a vector quantity that describes an object's mass in motion.
Question 14
The change in momentum of an object is equal to the impulse applied to it.
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impulse
Impulse is the product of the average force and the time interval over which it acts.
Question 15
In an isolated system, the total momentum before a collision is equal to the total momentum after the collision, illustrating the conservation of momentum.
Missing Word
conservation
The law of conservation of momentum states that the total momentum of a system remains constant if no external forces act on it.
Question 16
A collision in which kinetic energy is not conserved, such as when objects stick together, is classified as an inelastic collision.
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inelastic
In an inelastic collision, some kinetic energy is transformed into other forms, such as heat or sound.
Question 17
The acceleration directed towards the center of a circular path, responsible for changing the direction of velocity, is known as centripetal acceleration.
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centripetal
Centripetal acceleration is necessary to keep an object moving in a circular path at a constant speed.
Question 18
The rotational effect of a force about an axis, dependent on both the magnitude of the force and its lever arm, is called torque.
Missing Word
torque
Torque is a twisting force that causes rotation.
Question 19
An object is in static equilibrium when both the net force and the net torque acting on it are zero.
Missing Word
static
Static equilibrium implies that the object is at rest and not undergoing any translational or rotational acceleration.