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
AleksAgata [21]
3 years ago
7

A small canon is placed on top of a fortification the cannon ball leaves the muzzle of the canon with a speed of 85 m/s

Physics
1 answer:
Arlecino [84]3 years ago
4 0

Answer:

Speed of  cannonball just before it hits the ground is  90.77 m/s

Explanation:

Complete Question

A small cannon is placed on top of a fortification. the cannonball leaves the muzzle of the cannon with a speed of 85 m/s at an angle of 25°c above the horizontal. just before the cannonball hits the ground, the vertical component of velocity is 48 m/s downward. what is the speed of the cannonball just before it hits the ground? ignore air resistance.

Solution

Given  

Speed = 85 m/s

The angle = 25 degrees

When it will hit the ground, then vertical velocity = 48 m/s

However, in the projectile motion, the horizontal component will not change  

Vr = V cos (theta) = 85 * cos25

Speed of  cannonball just before it hits the ground is  

V’ = Sqrt (48^2 + (85 * cos 25)^2) = 90.77 m/s

You might be interested in
Why does the total amount of energy before and after any energy transformations remain the same?
Georgia [21]
The amount of energy before and after any energy transformations remain the same because energy cannot be created or destroyed. From the law conservation of energy; any time energy is transferred between two objects, or converted from one form into another, no energy is created and none is destroyed. The total amount of energy involved in the process remains the same.
3 0
3 years ago
Read 2 more answers
An undiscovered planet, many lightyears from Earth, has one moon in a periodic orbit. This moon takes 2010 × 103 seconds (about
vazorg [7]

Answer:

Radial acceleration of moon is a_{r} = 2.246\times 10^{-3}\frac{m}{s^{2} }

Explanation:

Given :

Time period T = 1.987 \times 10^{6} sec

Distance from center of moon to planet r = 225 \times 10^{6} m

From the equation of radial acceleration,

  a_{r} = r\omega ^{2}

Where \omega = 2\pi f = \frac{2\pi }{T}

So   \omega = 3.16 \times 10^{-6} \frac{rad}{s}

Now moon's radial acceleration,

 a_{r} = 225 \times 10^{6} \times (3.16 \times 10^{-6} )^{2}

 a_{r} = 2246.76 \times 10^{-6}

 a_{r} = 2.246\times 10^{-3} \frac{m}{s^{2} }

7 0
3 years ago
Discuss the elements of a successful business man or woman
Mrac [35]

In order to indicate that ones business is indeed successful, you need to look into the following characteristics:

<span>·         </span>Planning – oversee the possible mistakes and create plan Bs. Know the company’s statement of purpose, goals, etc.

<span>·         </span><span>Evaluation – assess the plan after its pilot test for area of improvement</span>

3 0
3 years ago
A 0.0100-kilogram grape hangs from a vine 1.50 meters from the ground. What is the potential energy of the grape?
ludmilkaskok [199]
The potential energy is defined as Ep=m*g*h where m is the mass of the body, g=9.81 m/s² and h is the height of the body. In our case m=0.01 kg and h=1.5 m. So when we input the values into the equation:

Ep=0.01*9.81*1.5= 0.14715 J. 

So the potential energy of a grape is Ep=0.14715 J. 
8 0
3 years ago
Read 2 more answers
A freight train car is moving at a constant speed with respect to the ground of Vcg. A man standing on a flatbed car throws a ba
11111nata11111 [884]

Answer:

chiicken

Explanation:

5 0
2 years ago
Other questions:
  • A 25 kg box sliding to the left across a horizontal surface is brought to a halt in a distance of 15 cm by a horizontal rope pul
    6·1 answer
  • What usually happens to the host’s DNA during the lytic cycle?
    12·1 answer
  • An electric motor rotates 60 times per second if the alternating current source is 60 Hz. How many times will an electric motor
    12·1 answer
  • A ball dropped from rest falls freely until it hits the ground with a speed pf 20 m/s. The time during with the ball is in free
    11·1 answer
  • Can all rocks be weathered and eroded?how do you know?
    14·2 answers
  • Four compasses are placed around a wire, as shown. The wire is then connected to a battery so that a current flows down the wire
    8·2 answers
  • How do electrons flow through a wire
    7·1 answer
  • What r they??????????????????
    7·1 answer
  • Assess It! Question #2: Which of the following statements about the Law
    10·2 answers
  • Horizontal displacement?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!