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
Thepotemich [5.8K]
3 years ago
10

What minimum speed must the rocket have just before impact in order to save the explorer's life?

Physics
1 answer:
34kurt3 years ago
8 0
<span>Answer: Assuming that I understand the geometry correctly, the combine package-rocket will move off the cliff with only a horizontal velocity component. The package will then fall under gravity traversing the height of the cliff (h) in a time T given by h = 0.5*g*T^2 However, the speed of the package-rocket system must be sufficient to cross the river in that time v2 = L/T Conservation of momentum says that m1*v1 = (m1 + m2)*v2 where m1 is the mass of the rocket, v1 is the speed of the rocket, m2 is the mass of the package, and v2 is the speed of the package-rocket system. Expressing v2 in terms of v1 v2 = m1*v1/(m1 + m2) and then expressing the time in terms of v1 T = (m1 + m2)*L/(m1*v1) substituting T in the first expression h = 0.5*g*(m1 + m2)^2*L^2/(m1*v1)^2 solving for v1, the speed before impact is given by v1 = sqrt(0.5*g/h)*(m1 + m2)*L/m1</span>
You might be interested in
U"LL GET 24PTS IF U HELP ME
gavmur [86]

Answer: When your bike stops from brakes.

Explanation: Force and friction affect our daily lives in numerous amounts of ways. For instance, when a football is kicked, it moves faster later after some time its force decreases due to friction. A common example of friciton is when a bike stops. When the brakes are applied the friction on the pads cause the bike to stop.

6 0
3 years ago
Q4: Two fixed charges, 1 c and -3 C are
White raven [17]

Answer:

B

Explanation:

Is the equilibrium stable or unstable for the third charge

5 0
2 years ago
Which factor indicates the amount of charge on the source charge?
Elina [12.6K]
B. The number of field lines on the source charge.
4 0
3 years ago
Read 2 more answers
386.5<br>- 129.18 what is it​
algol [13]

Answer:

257.32

Explanation:

I jus worked it out on paper. Brainliest please?

5 0
3 years ago
Read 2 more answers
When a 0.622 kg basketball hits the floor, its velocity changes from 4.23 m/s down to 3.85 m/s up. If the ball was in contact wi
SVEN [57.7K]

when the ball hits the floor and bounces back the momentum of the ball changes.

the rate of change of momentum is the force exerted by the floor on it.

the equation for the force exerted is

f = rate of change of momentum

f = \frac{mv - mu}{t}

v is the final velocity which is - 3.85 m/s

u is initial velocity - 4.23 m/s

m = 0.622 kg

time is the impact time of the ball in contact with the floor - 0.0266 s

substituting the values

f = \frac{0.622 kg (3.85 m/s - (-)4.23 m/s)}{0.0266}

since the ball is going down, we take that as negative and ball going upwards as positive.

f = 189 N

the force exerted from the floor is 189 N

4 0
3 years ago
Other questions:
  • A square coil (length of side = 24 cm) of wire consisting of two turns is placed in a uniform magnetic field that makes an angle
    15·1 answer
  • Why generally metals are good conductor and non metals are bad conductor of electricity ​
    13·1 answer
  • The Petronas twin towers in Malaysia and the Chicago Sears tower have heights of about 452 m and 443 m respectively. If objects
    14·1 answer
  • A small 32-kilogram canoe broke free of its dock and is now floating downriver at a speed of 2.5 m/s. What is
    6·1 answer
  • What is the focal length of a concave mirror that magnifies, by a factor of +3.2, an object that is placed 30 cm from the mirror
    11·1 answer
  • In Young’s double-slit experiment using monochromatic light, the interference pattern consists of a central _____.
    14·2 answers
  • What is the correct answer choice? PLEASE HELP
    9·1 answer
  • How does an octopus or a squid uses Newton's third law of motion to escape from enemies
    6·1 answer
  • The cheetah is considered the fastest running animal in the world. Cheetahs can accelerate to a speed of 21.7 m/s in 2.50 s and
    13·1 answer
  • What W is the amount of force with which gravity is pulling down on something<br>​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!