Physics, 06.11.2021 03:40 goofy44

Force 1: The force which pulls objects towards the surface of a planet. Force 2: The force which attracts iron nails towards a magnet.
Which statement is true about the forces?
Force 1 describes gravitational force, which is a contact force. Force 2 describes
magnetic force, which is a non-contact force.
Force 1 describes gravitational force, which is a contact force. Force 2 describes
magnetic force, which is a contact force.
Force 1 describes gravitational force, which is a non-contact force. Force 2 describes
magnetic force, which is a non-contact force.
Force 1 describes gravitational force, which is a non-contact force. Force 2 describes
magnetic force, which is a contact force.

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Answer from: zoeybuch5

Friction is an important thing in life and we use it to move things or friction is used on us.

Explanation: Friction happens when you rub against something or when someone or something rubs against you.

Answer from: Quest

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.

Answer from: Quest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

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Force 1: The force which pulls objects towards the surface of a planet. Force 2: The force which a...