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Physics > Cp2 forces and motions > Flashcards

Cp2 forces and motions Flashcards

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1
Q

What are force arrows

A

Force arrows are arrows that represent the magnitude and direction of forces in a diagram. The arrowhead shows the direction of the force.

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2
Q

What is a resultant force

A

A resultant force is the combination of two or more forces that act on an object at the same time. It is equal to the sum of all the individual forces and is in the direction of the strongest force.

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3
Q

How do you calculate a resultant force

A

To find the resultant force you need to subtract the overall magnitude of the smaller force in one direction from the magnitude of the larger force in the opposite direction.

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4
Q

What are balanced forces

A

Balanced forces are two overall forces that act on an object in opposite directions and are equal in magnitude.

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5
Q

If the forces on an object are balanced, will the object stop moving

A

If the forces on an jobject are balanced. the motion of the object they are acting on remains unchangeg, meaning they are at rest still or constant velocity

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6
Q

what is a non-zero resultant force

A

A non-zero resultant force is a resultant force that is not balances

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7
Q

what is the effect on a non-zero/unbalanced resultant force on a sationary and moving objects

A

A non-zero resultant force will cause a stationary object to accelerate in the direction of the force, while a moving object will have its direction and speed of motion changed by the force.

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8
Q

What is newtons first law

A

Newton’s first law ;also known as the law of inertia states that an object at rest will remain at rest, and an object in motion will remain in motion in a straight line at a constant speed, unless acted upon by an external force.

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9
Q

https://www.educationquizzes.com/gcse/physics/forces-circular-motion/

A

https://www.educationquizzes.com/gcse/physics/forces-circular-motion/

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10
Q

what is mass

A

Mass is a physical property of a body or object, equal to the amount of matter it contains. It is measured in kilograms (kg)

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11
Q

what is weight

A

Weight is a measure of the force of gravity on an object. It is measured in Newtons (N)

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12
Q

what is the difference between mass and weight

A

Mass is scalor and weight is vector, meaning that weight has direction (towards the planet/downwards). Mass is always the same, regardless of where an object is located, while weight changes depending on the gravity of the environment.

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13
Q

How do you calculate weight

A

Weight = Mass x Gravitation field strength / W=mg

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14
Q

what is the gravitational field strength of earth

A

10n/kg

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15
Q

What is newtons second law

A

the greater the mass the greater the force of attraction

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16
Q

what is the equation for newtons second law

A

force = mass x acceleration / f=ma

17
Q

What is intertial mass

A

Inertial mass is a measure/tendancy of an object’s resistance to being accelerated by a force.

18
Q

WHAT is INERTIAL mass measured in

A

Kgm/s

19
Q

what is terminal velocity

A

Terminal velocity is the fastest speed an object can reach while falling air or water, due to the drag force of the air or water.

20
Q

A person is on the ground, their weight is equal to the upward force from the ground, the forces are ________.

A

Balanced

21
Q

Whenever forces are unbalanced, the person or object will

A

Accelerate or deccelerate

22
Q

What is newtons third law

A

Newton’s Third Law states that for every action/force, there is an equal and opposite reaction/force.

23
Q

what is an equilibrium state

A

In physics, an equilibrium situation is one in which the sum of all forces acting on a system is zero and the system is in a state of unchanging motion.

24
Q

What is the equation for momentum

A

momentum = mass x velocity / P=MV

25
Q

Is momentum a scaler or vector quantity

A

Momentum is a vector quantity

26
Q

What is the conservation of momentum principal

A

Total momentum before collision = Total momentum after`

27
Q

When two objects hit eachother and they both travel in one direction together due to momentum, what happens to their mass

A

the mass combines

28
Q

what is momentum measured in

A

Kgm/s

29
Q

what is the second equation for momentum

A

𝐹 Δ𝑡 = Δ𝑝

30
Q

what is work done

A

work done is the quantity of energy transferred by the force to move an object

31
Q

What is the equation for work done

A

Work done = force x distance / W=FD

32
Q

What is the equation for kinetic energy

A

Kinetic energy = 1/2 x mass x velocity squared / KE = 1/2MV^2

33
Q

What are some factors that can affect kinetic energy

A

Mass, velocity

34
Q

How do you calculate breaking distance

A

Breaking distance = 1/2 x (inital velocity)^2/acceleration

35
Q
A

Physics (8 decks)

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