Motion
What is Motion?
motion, in physics, change with time of the position or orientation of a body.
What is force?
Push or pull.
Which force is responsible for stability of our universe?
Gravitational Force.
What are 3 ways of acceleration?
Increasing speed, decreasing speed (deceleration), and change in motion.
Who created Newton's Laws?
Isaac Newton.
What are some examples of motion?
walking, running, closing the door.
How is force measured?
In Newtons (N).
How is the weight of an object related to its mass?
The weight of an object is directly proportional to its mass.
What's Acceleration formula?
Acceleration (a) = (Final Velocity (v) - Initial Velocity (u)) / Time (t) or a = (v - u) / t.
Pushing a car is one of the examples of what law?
Newton's second law.
True or false: A moon orbiting a planet is considered as motion.
True.
What causes a vehicle to move?
Friction/ Frictional Force.
Mass of boy on earth is 40kg, what is the mass on the moon?
Same mass.
How does speed affect acceleration?
If the speed is increasing, the car has positive acceleration. When the car slows down, the speed decreases.
What does Newton's 1st law states?
An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.
If the total displacement is divided by the total time taken, which of the following will be obtained?
Average Speed.
What force causes a body to move?
Unbalanced force.
Why is gravity not a real force?
Gravity has no mass.
How is acceleration zero?
When it is moving with a constant velocity.
What law of motion describes the movement of car?
Newton's third law.
What kind of energy does a body possess when it is in the state of complete rest?
a) Kinetic energy
b) Potential energy
c) Thermal energy
d) Electrical energy
B)Potential Energy.
What is/are most important force(s)?
Gravitational force; Strong Nuclear force; Weak Nuclear force; Electromagnetic force.
Why does the moon's gravity cause tides on earth but the sun's gravity doesn't?
The Moon's gravity has a greater effect on Earth's ocean tides than the Sun's, primarily because the Moon is much closer to Earth, leading to a stronger gravitational gradient, even though the Sun has a much larger mass.
True or false: Bad brakes can affect acceleration. ("Bad brakes" refers to a car's braking system that is not functioning correctly, potentially leading to reduced stopping power, longer stopping distances, and increased risk of accidents.)
True. Bad brakes can negatively affect a car's acceleration, particularly if the brakes are sticking or dragging, causing the car to seem to lack power and accelerate slowly.
According to ______, the acceleration of an object is equal to the net force acting on the object divided by the object's mass
Newton's second law.