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
Misha Larkins [42]
3 years ago
14

A 63.0-kg sprinter starts a race with an acceleration of 4.20 m/s2 . what is the net external force on him?

Physics
1 answer:
lora16 [44]3 years ago
8 0
From Newton's second law of motion, it was stated that the net external force on a certain object can be calculated by multiplying its mass to the acceleration. This can mathematically be expressed as,
     Fnet = m x a
where m is mass and a is acceleration.

Substitute the known values to the equation,
      Fnet = (63 kg) x (4.20 m/s²)
      Fnet = 264.6 kg m/s²
 
ANSWER: <em>Fnet = 264.6 N</em>
You might be interested in
A book falls of the table and hits the floor. Is work done? Why?​
morpeh [17]

<u>Yes, work is done when a book falls of the table.</u>

This is because:

When the book falls, it's potential energy is converted into kinetic energy.   As it reaches the floor down, this kinetic energy is converted to heat energy and sound energy due to the impact.

When a force is imposed on an object to cause displacement of that object, work is done on that object. For a force to do work on an object, there should be a displacement and this force should cause the displacement. So here, since the book falls from the table and causes the displacement of the book from the table to the floor. It is said that work is done.

Work can be given by the formula:

W = F • d

where F is the force and d is the displacement.

6 0
3 years ago
Read 2 more answers
Summerize how friction and inertia act on an object sliding on a flat surface
natta225 [31]
Inertia is when a object in motion will stay in motion or in a standing still state unless acted upon by a unbalancing force.
Friction is when a object slows down because it is rubbing against another object.

If a object is sliding across a surface, theoretically, it would not stop but because it is on a flat surface it would experience friction, this will disperse some of the kinetic energy that it has thus slowing the object down eventually, after some time, to a stop.

Hope this helps! :)
5 0
3 years ago
A car drives around a curve with radius 400 m at a speed of 32 m/s. The road is banked at 7.0 degree. The mass of the car is 150
Ronch [10]

Answer:

The magnitude of the centripetal force to make the turn is 3,840 N.

Explanation:

Given;

radius of the cured road, r = 400 m

speed of the car, v = 32 m/s

mass of the car, m = 1500 kg

The magnitude of the centripetal force to make the turn is given as;

F_c = \frac{mv^2}{r}

where;

Fc is the centripetal force

F_c = \frac{mv^2}{r} \\\\F_c = \frac{(1500)(32)^2}{400}\\\\F_c = 3,840 \ N

Therefore, the magnitude of the centripetal force to make the turn is 3,840 N.

3 0
3 years ago
Can somebody please answer this correctly I will give brainliest
vodka [1.7K]
I think what’s wrong is that the paper clip isn’t connecting to the other thing on the bottom
8 0
3 years ago
A technician is diagnosing a car that had both front brake hoses replaced 5,000 miles ago. An inspection reveals that the right
Mamont248 [21]

Answer:

Option B

Technician B only is correct

Explanation:

Technician a is wrong because the rupture was not caused by switching DOT (Department of Transportation) 3 and DOT 4 Brake fluids. As a matter of fact both brake fluids are compatible with most vehicular systems, and to a certain extent they can be used interchangeably without any adverse effect.

Technician B on the other hand, gives a more accurate reason, since a twisted brake hose will definitely fail and rupture once enough force is applied to it, which is most likely the case of what happened considering the mileage it ran before rupturing. Within this mileage, it is very possible for the pressure on the already twisted brake hose to have been damaging it gradually before finally making it to rupture.

4 0
3 years ago
Other questions:
  • NVM hwaskdhslak djklasj dkjaskj dklasj kJKS KLj klskla
    5·2 answers
  • DNA’s diameter is 0.000000002 meters. What is this measurement in scientific notation? a. 2.0 x 109 m
    9·1 answer
  • What is the role of MnO2 in a dry cell?​
    6·1 answer
  • Im need some help with this please
    13·1 answer
  • How are you progressing towards the goals you set for yourself? What do you need to keep on track?
    12·2 answers
  • Three liters (3000 cm3) of oil is spilled onto a smooth lake. If the oil spreads out uniformly until it makes a circular oil sli
    6·1 answer
  • The cylinder with piston locked in place is immersed in a mixture of ice and water and allowed to come to thermal equilibrium wi
    14·1 answer
  • The voltage drop across R1 is
    6·1 answer
  • What does photosenthesis mean 88 points
    12·2 answers
  • What will happen to the period of a ball-on-a-spring if the ball is replaced by a smaller one with half the mass
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!