Newton’s Laws
Which of the newton law's do Inertia related to.
Newton's First Law
In a normal projectile motion, what will be the condition for maximum range?
θ = 45°
A parachutist after bailing out falls 50 m without friction. When the parachute opens, it decelerates at 2 m/s2. He reaches the ground with a speed of 3 m/s. At what height, did he bailout?
243m
What is the difference between mass and weight?
mass is the amount of matter in a material, while weight is a measure of how the force of gravity acts upon that mass.
What is the unit of measure for force?
The newton
Which of the Newton Laws can be used to calculate the force on a body?
Newton's second law
In a normal projectile motion, what will be the condition for maximum height?
θ = 90°
An automobile travelling with a speed of 60 km/h, can brake to stop within a distance of 20 m. If the car is going twice as fast, i.e., 120 km/h, the stopping distance will be?
80m
How does mass relate to inertia?
The more mass found in an object the more inertia it contains and therefore the greater its tendency to resist change.
What is the sum of all forces acting on an object called?
Net force
which of the newton laws can be used to determine the reaction forces on a body?
Newton's Third Law states that for every action in nature there is an equal and opposite reaction
In a normal projectile motion, which of the following quantities has an effect in calculating the body’s mass?
force
If a body loses half of its velocity on penetrating 3 cm in a wooden block, then how much will it penetrate more before coming to rest?
1cm
What is the significance of density in relation to mass?
The relationship between the mass of the substance and how much space it takes up.
Newton's First Law of Motion is also called?
Law of inertia
what the correct mathematical representation of Newton’s second law of motion?
F = ma
What is the concept of acceleration in horizontal and vertical projectile motion?
The horizontal velocity of a projectile is constant in never changing in value There is a vertical acceleration caused by gravity.
A police officer living on a planet with no air resistance drops a pair of handcuffs and a handkerchief from the same height at the same time Which one will reach the ground first?
The handkerchief
What does the conservation of momentum mean?
The conservation of momentum states that, within some problem domain, the amount of momentum remains constant.
Newton's first Law of Motion states that if there is no net force acting on an object it will?
Remain at rest.
In still water, when a person walks on a boat, what will happen to the boat’s motion?
the boat move away from the shore.
An object of mass 2000 g covers a maximum vertical distance of 6 m when it is projected at an angle of 45° from the ground. Calculate the velocity with which it was thrown. Take g = 10 m/s2
15.49 m/s
Which one of the following physical quantities cannot be represented by a scalar?
Angular momentum
What object has a lot of momentum?
A moving object
What does Newton's Second Law of Motion state?
F = ma