1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
andrey2020 [161]
3 years ago
6

Question 6 options: When a cannon is fired, the projectile moves forward. According to Newton's 3rd law, the cannon will want to

travel
PLEASE HELP!!!!!!!
question will give you 20PTS!!!
Physics
1 answer:
anygoal [31]3 years ago
5 0

Backwards i just took the test

You might be interested in
A ball is dropped from rest from the top of a building of height h. At the same instant, a second ball is projected vertically u
uranmaximum [27]

Answer:

a) t = \sqrt{\frac{h}{2g}}

b) Ball 1 has a greater speed than ball 2 when they are passing.

c) The height is the same for both balls = 3h/4.

Explanation:

a) We can find the time when the two balls meet by equating the distances as follows:

y = y_{0_{1}} + v_{0_{1}}t - \frac{1}{2}gt^{2}  

Where:

y_{0_{1}}: is the initial height = h

v_{0_{1}}: is the initial speed of ball 1 = 0 (it is dropped from rest)

y = h - \frac{1}{2}gt^{2}     (1)

Now, for ball 2 we have:

y = y_{0_{2}} + v_{0_{2}}t - \frac{1}{2}gt^{2}    

Where:

y_{0_{2}}: is the initial height of ball 2 = 0

y = v_{0_{2}}t - \frac{1}{2}gt^{2}    (2)

By equating equation (1) and (2) we have:

h - \frac{1}{2}gt^{2} = v_{0_{2}}t - \frac{1}{2}gt^{2}

t=\frac{h}{v_{0_{2}}}

Where the initial velocity of the ball 2 is:

v_{f_{2}}^{2} = v_{0_{2}}^{2} - 2gh

Since v_{f_{2}}^{2} = 0 at the maximum height (h):

v_{0_{2}} = \sqrt{2gh}

Hence, the time when they pass each other is:

t = \frac{h}{\sqrt{2gh}} = \sqrt{\frac{h}{2g}}

b) When they are passing the speed of each one is:

For ball 1:

v_{f_{1}} = - gt = -g*\sqrt{\frac{h}{2g}} = - 0.71\sqrt{gh}

The minus sign is because ball 1 is going down.

For ball 2:

v_{f_{2}} = v_{0_{2}} - gt = \sqrt{2gh} - g*\sqrt{\frac{h}{2g}} = (\sqrt{1} - \frac{1}{\sqrt{2}})*\sqrt{gh} = 0.41\sqrt{gh}

Therefore, taking the magnitude of ball 1 we can see that it has a greater speed than ball 2 when they are passing.

c) The height of the ball is:

For ball 1:

y_{1} = h - \frac{1}{2}gt^{2} = h - \frac{1}{2}g(\sqrt{\frac{h}{2g}})^{2} = \frac{3}{4}h

For ball 2:

y_{2} = v_{0_{2}}t - \frac{1}{2}gt^{2} = \sqrt{2gh}*\sqrt{\frac{h}{2g}} - \frac{1}{2}g(\sqrt{\frac{h}{2g}})^{2} = \frac{3}{4}h

Then, when they are passing the height is the same for both = 3h/4.

I hope it helps you!                  

7 0
3 years ago
What is the current in a series circuit that has two resistors (4.0 ohms and
Maslowich
C 1.6 amps hipe this helps
6 0
3 years ago
Based on Schaffer's arguments in "The Value of a Sherpa Life," choose the statement
Tju [1.3M]

Answer:

Sherpas do work that is much more meaningful than the work other climbers do.

Explanation:

3 0
3 years ago
Two rocks are moving through empty space in a straight line at the same speed. One has a mass of 10 kg, the other has a mass of
Yuki888 [10]
A and D are definitely wrong because the two rocks have different masses, so it leaves us with B and C. The most logical answer to the question is
C <span>The one with greater mass takes more force to stop. 
</span>
6 0
3 years ago
The first step of making the scientific method involves making ----------
mel-nik [20]
Answer: Objective Observations

Explanation: The first step in the Scientific Method is to make objective observations. These observations are based on specific events that have already happened and can be verified by others as true or false
7 0
3 years ago
Other questions:
  • Which element has the greatest number of valence electrons?
    12·2 answers
  • A satellite dish is shaped like a paraboloid of revolution. This means that it can be formed by rotating a parabola around its a
    11·1 answer
  • If the number of particles is increased in a balloon what happens to the pressure inside of it?
    7·1 answer
  • A cat is chasing a mouse across a 1.3 m tall dining table. The mouse darts to the side and the cat accidentally slides off, land
    9·1 answer
  • A 35 kg box rests on the back of a truck. The coefficient of static friction bet?005 (part 1 of 2)A 35 kg box rests on the back
    11·1 answer
  • A mass of 5 kg of saturated water vapor at 150 kPa is heated at constant pressure until the temperature reaches 200°C. Calculate
    13·1 answer
  • According to the law of refraction, light passing from air into a piece of glass at an angle of 30 degrees will cause the light
    7·1 answer
  • Blank parasites can cause serious Illnesses like West Nile virus and Lyme diseases
    13·1 answer
  • There are several ways to model a compound. One type of model is shown. 4 C's are connected in a line by 3 black lines. The C on
    11·1 answer
  • The diagram below shows how sunlight is radiated back into the Earth's atmosphere as heat (infrared radiation).
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!