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
Bond [772]
3 years ago
6

A 60.0 kg girl stands up on a stationary floating raft and decides to go into shore. She dives off the 180 kg floating raft with

a velocity of 4.0 m/s [W]. Ignore the substantial friction real objects in water experience.
A) What is the momentum of the girl as she is diving?
B) What is the momentum of raft as the girl is diving?
C) What is the final speed of the raft just after the girl dives?
Physics
1 answer:
lord [1]3 years ago
6 0
Momentum, p = m.v
m of the girl = 60.0 kg
m of the boat = 180 kg
v of the girl = 4.0 m/s

A) Momentum of the girl as she is diving:
p = m.v = 60.0 kg * 4.0 m/s = 24.0 N/s

B) momentum of the raft = - momentum of the girl = -24.0 N/s

C) speed of the raft

p = m.v ; v = p/m = 24.0N/s / 180 kg = -0.13 m/s [i.e. in the opposite direction of the girl's velocity]
You might be interested in
How is electron movement related to the bonding in sodium chloride?
irina1246 [14]
I think its c sorry if I’m wrong
8 0
3 years ago
Read 2 more answers
How to calculate wavelength in m when you know the frequency?
NNADVOKAT [17]
It's c/f, in which c is the speed of light (300000 m/s)
6 0
2 years ago
Sawyer launches his 180 kg raft on the Mississippi River by pushing on it with a force of 75N. How long must Sawyer push on the
Daniel [21]

Answer: 4.8 s

Explanation:

We have the following data:

m=180 kg the mass of the raft

F=75 N the force applied by Sawyer

V=2 m/s the raft's final speed

V_{o}=0 m/s the raft's initial speed (assuming it starts from rest)

We have to find the time t

Well, according to Newton's second law of motion we have:

F=m.a (1)

Where a is the acceleration, which can be expressed as:

a=\frac{\Delta V}{\Delta t}=\frac{V-V_{o}}{t-t_{o}} (2)

Substituting (2) in (1):

F=m\frac{V-V_{o}}{t-t_{o}} (3)

Where t_{o}=0

Isolating t from (3):

t=\frac{m(V-V_{o})}{F} (4)

t=\frac{180 kg(2 m/s-0 m/s)}{75 N}

Finally:

t=4.8 s

6 0
2 years ago
After the first few seconds of a race, a runner runs at the same speed until she approaches the finish line, at which point she
Rzqust [24]

DUJFIOflmC VANWSER

EXPLANTATION

5 0
2 years ago
How long does it take to travel to Mercury while going 100,000 km per hour?
Bond [772]
It Would Take Aprroximately 1000 Years.
6 0
3 years ago
Other questions:
  • The following is a chemical reaction for _______ with ozone.
    11·2 answers
  • Charge is placed on two conducting spheres that are very far apart and connected by a long thin wire. The radius of the smaller
    7·1 answer
  • At a college homecoming 20 students lifted a sports car. Each student exerted 450N of upward force on the car. a) What is the ma
    10·1 answer
  • Which occurs during transcription?
    11·2 answers
  • Jordan wants to know the difference between using a 60-W and 100-W lightbulb in her lamp. She calculates the energy it would tak
    6·1 answer
  • Magnetic field lines exit out of the?
    11·1 answer
  • a group of students working in a high school chemistry lab believe they have discovered a new element! how exciting! upon furthe
    11·1 answer
  • A metal blade of length L = 300 cm spins at a constant rate of 17 rad/s about an axis that is perpendicular to the blade and thr
    10·1 answer
  • A hydraulic system is used to lift a 20,000 N vehicle in an auto garage. If the vehicle sits on
    12·1 answer
  • Which of the following relationships determines an object’s ability to float in a liquid?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!