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
motikmotik
3 years ago
8

A boy of 50 kg jumps off a boat (30 kg), causing the boat to move to the right at 2.0 m/s. In what direction and at what velocit

y does the boy move? (Remember to include - to indicate direction if necessary.)
V=____ m/s to the _____
Physics
2 answers:
LUCKY_DIMON [66]3 years ago
8 0
By Newtons Third law this is an action reaction pair of force
So the momentum is the same
30*20=50*x where x is velocity
x= 12m/s
direction is towards left since they act in opposite directions
andrew11 [14]3 years ago
5 0

Answer: The boy moves with velocity = <u>1.2 m/s</u> to the <u>left</u>.

Explanation:

<u>From law of conservation momentum, when there is no net external force acting on the system, the momentum remains conserved.</u>

⇒M u + m u' = M v + m v'

M is the mass of boy = 50 kg

u is its initial velocity = 0

m is the mass of the boat, m = 30 kg

u' is the initial speed of the boat, = 0

v is the final velocity of the boy

v' is the final velocity of the boat = +2.0 m/s

we would consider positive direction towards and negative towards left.

⇒ 0 = 50 v + 30 × 2

⇒ -50 v = 60

⇒ v = - 1.2 m/s (negative sign indicates towards left)

Thus, the boy moves with velocity = <u>1.2 m/s</u> to the <u>left</u>.

You might be interested in
One glass microscope slide is placed on top of another with their left edges in con- tact and a human hair under the right edge
-Dominant- [34]

Answer:

A dark fringe

8 0
3 years ago
Calculate delta g for the reaction if the partial pressures of the initial mixture are pcl5 = .0029 atm, pcl3 = .27 atm, and pcl
AnnyKZ [126]

Answer: equation for the reaction is given below

PCL2+PCL3=PCL5

Where pcl2=0.40atm,pcl3=0.27atm

Pcl5=0.0029atm

Using ∆G=-RTin(PCL5/PCl2*PCL3)

Where R=8.314J/K/mol and T=298K

∆G=-8.314*298in(0.0029/0.40*.27)

∆G=8962.6J/mol

Explanation:

7 0
3 years ago
A worker pushes a crate horizontally across a warehouse floor with a force of 245 N at an angle of 55 degrees below the horizont
aev [14]

Answer:

option A

Explanation:

given,

For exerted by the worker = 245 N

angle made with horizontal = 55°

we need to calculate Force which is not used to move the crate = ?

Movement of crate is due to the horizontal component of the force.

Crate will not move due to vertical force acting on the it.

F_y = F sin \theta

F_y = 245\times sin 55^0

F_y =200.69

hence, worker's force not used to move the crate is equal to 200.69

The correct answer is option A

6 0
3 years ago
Read 2 more answers
A baseball player hits a baseball with a bat. The mass of the ball is 0.25 kg. The ball accelerates at 200 m/s2. What is the for
Brums [2.3K]

Answer:

50N

Explanation:

Force (N) = mass (kg) × acceleration (m/s²)

0.25kg times 200m/s² = 50N

6 0
2 years ago
What is system thinking ?
Greeley [361]

Answer: Systems thinking is a holistic approach to analysis that focuses on the way that a system's constituent parts interrelate and how systems work over time and within the context of larger systems.

7 0
3 years ago
Other questions:
  • How are electromagnetic waves different from all other waves
    12·1 answer
  • Why are the spheres representing nitrogen and oxygen different colors
    8·1 answer
  • A 60 kg skier starts from rest at the top of a frictionless slope of height of 35 meters. The velocity at the bottom is v. If a
    14·2 answers
  • Desde una altura de 120 m se deja caer un cuerpo. Calcular a los 2,5 s i) la rapidez que lleva; ii) cuánto ha descendido; iii) c
    9·1 answer
  • What does potential energy depend on?
    15·2 answers
  • What speed would a fly with a mass of 0.55g need in order to have a kinetic energy of 7.6 •10^4 j?
    12·1 answer
  • Which organ in the human body do you think is the most important?
    11·1 answer
  • I’ll give brainliest and 10 points
    5·1 answer
  • A hiker walks 200 m west and then walks 100 m north. In what direction is her resulting displacement?a. northb. westc. northwest
    6·1 answer
  • A horizontal force F~ is applied to a block of mass m = 1 kg placed on an inclined
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!