A toy cannon uses a spring to project a 5.30-g soft rubber ball. The spring is originally compressed by 5.00 cm and has a force constant of 8.00 N/m. When the cannon is fired, the ball moves 15.0 cm through the horizontal barrel of the cannon, and the barrel exerts a constant friction force of 0.032 N on the ball. A) With what speed does the projectile leave the barrel of the cannon?
B) At what point does the ball have max speed?
C) What is the maximum speed?

Shown below;

Explanation:

From Newton's third law action and reaction.

Hence the force initiated by the spring is defined as;

F= K×E ; K- spring constant

E- distance moved by the spring.

F = 8.0 × 0.05= 0.4N; 0.05 m = 5cm.

The Canon would move out the gun with a speed of the net force.

The net force = 0.05 -0.032= 0.018N

This force = mass × velocity/ time

= mass × distance /time^2

0.018 =0.0053×0.15/t^2

t^2 = 0.0053×0.15/0.018=0.0442s

t=√0.0442=0.21

Velocity = distance/time

=0.15/0.21=0.71m/s

B. it sustains Maximum speed when it reaches there ground.

C. We assume the gun leaves at 45° to get the maximum distance which is the maximum height.

H = u^2sin2A/2g

= 0.71^2 sin 2×45/ 2×9.8

=0.5041/18.6=0.0271m

From Newton's law

V2 =u2+2gh

V2 = 0.71^2 + 2×9.8×0.0271

= 0.5041 + 0.53116

V=√1.03526=1.0175 = 1.02m/s

quantum mechanics or quantum physics is physics of very small objects (particles) and physical entities.

quantum physics has some parallels to our macro world and some pretty unique ideas which theoretically and mathematically proven to be true even though we will never be able to access them because of our size.

there are many types of particles: subatomic, elementary etc.

subatomic means they are smaller than atom, elementary means they are at the very basis of everything.

subatomic particles are for eg. protons, neutrons but not electrons.

elementary particles are categorised into 3 groups by what they do.

these 3 groups are quarks, leptons and bosons.

light for example is a particle more precisely a photon a part of leptons.

proton (subatomic particle) is made out of 2 up quarks and 1 down quark each of these has a fractional charge like . (i crazy)

most famous scientist who contributed to this physics are:

the topic itself us understand a lot and will probably be vastly used in the future (quantum computers, understanding the big bang,

we also must not forget quantum effects like:

and there is more. but probably too much for this answer to be consistent due to my average understanding of this topic.

hope this you understand quantum mechanics a little more. i'm not an expert in the topic (so don't be like wth if you are an expert) but i'm very interested in it.

anyways quantum physics is a very hard topic (harder than physics (perhaps)) therefore searching for every information there is about it and learning it is unfortunately impossible (you can only specialise into 1 - 3 things or more (perhaps

have fun and i wish you luck!

r3t40

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary