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
PtichkaEL [24]
3 years ago
13

A 60 kg sprinter has a momentum of +600 kg-m/s when he crosses the finish

Physics
1 answer:
MakcuM [25]3 years ago
3 0

Answer:

10 ms⁻¹

Explanation:

The amount of momentum that an object has is dependent upon two factors

  • mass of the moving object  
  • speed of motion

In terms of an equation,

Momentum (P) = Mass(m)×velocity(v)

                     P = m×v

                 600 = 60 × v ⇒ v = 10 ms⁻¹

You might be interested in
A racecar driver has to hold on tightly when going around a banked curve. Approximately what is the centripetal force on a 2220.
g100num [7]

Let Regent Lead The Way
No matter your passion, you'll find your place at Regent! Choose from more than 95 areas of study in the subject areas employers deman
4 0
3 years ago
The energy of atoms and molecules in an object due to their motion is_______ energy
QveST [7]
I think the answer is potential 
7 0
3 years ago
In an experiment, an object is heated.
mariarad [96]

Answer:

B) 300 J/°C

Explanation:

Q = 3kJ = 3000J

ΔT = 10°C

3000J/10°C = 300J/°C

6 0
3 years ago
It is 5.5 km from your home to the physics lab. As part of your physical fitness program, you could run that distance at 10 km/h
stealth61 [152]

Explanation:

Displacement = 5 km

A.

Converting km/h to m/s,

10 km/h * 1000 m/1 km * 1 h/3600 s

= 25/9 m/s

Remember,

700 watt = 700 J/s

Velocity = displacement/time

Time = 5000/(25/9)

= 1800 s

Energy = power * time

= 700 * 1800

= 1,260,000

= 1260 kJ

B.

Converting km/h to m/s,

3 km/h * 1000 m/1 km * 1 h/3600 s

= 5/6 m/s

290 watt = 290 J/s

Velocity = displacement/time

Time = 5000/(5/6)

= 6000 s

Energy = power * time

= 290 * 6000

= 1,740,000

= 1740 kJ

C.

Walking burns more energy; 1,740,000 joules. It burns more because you walk for a greater period of time.

6 0
3 years ago
A loud sound is produced in the downtown section of a city. Which of the following is least likely to occur with the sound wave
JulsSmile [24]

Answer:

A. The sound wave will reflect off Buildings and automobiles.

Explanation:

This is because the sound waves would more likely propagate through diffraction through buildings and transmission through the air. It is also more likely to be absorbed by buildings than for multiple reflections to occur off buildings and automobiles. In the process of reflection, these materials would absorb the sound energy thereby reducing its ability to reflect.

6 0
3 years ago
Other questions:
  • An electric motor has a rating of 4.0 x 10^2 watts. How much time will it take for this motor to lift a 50.-kilogram mass a vert
    7·1 answer
  • An object moves in uniform circular motion at 25 m/s and takes 1.0 second to go a quarter circle. Calculate the centripetal acce
    13·1 answer
  • (II) A 20.0-kg box rests on a table. (a) What is the weight of the box and the normal force acting on it? (b) A 10.0-kg box is p
    14·1 answer
  • Which scientist first made a model of the atom called the plum pudding model?
    8·1 answer
  • the strong nuclear force is one which acts only on the ____________ (A) electrons in the electron cloud (B) attraction between a
    15·1 answer
  • An electric current is flowing through a copper wire. Which type of force can be produced by the flow of the current?
    6·2 answers
  • A projectile is launched vertically from the surface of the Moon with an initial speed of 1360 m/s. At what altitude is the proj
    7·1 answer
  • 4. Which of the following is equivalent to 800 cm?
    8·1 answer
  • During the contraction of the heart, 65 cm3 blood is ejected from the left ventricle into the aorta with a velocity of approxima
    14·1 answer
  • When is the kinetic energy of the ball zero and when is it at its highest? When is its potential energy at its lowest and at its
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!