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
andreev551 [17]
3 years ago
5

Bill and Bob are carrying loads of trash to the dump. They are walking down the sidewalk, side by side but Bob begins to lag beh

ind Bill. Explain what's happening using one of Newton's Laws of Motion.
A) Newton's 2nd Law. Bob and Bill are pulling the two loads with unequal forces.
B) Newton's 1st Law. Bob's wagon and load will not move unless he exerts a force on it.
C) Newton's 2nd Law. Bob is pulling the heavier load. He needs a greater force to move as fast as Bill.
D) Newton's 3rd Law. For every action there is an equal and opposite reaction. Bob's action is not enough to move as fast as Bill.
Physics
1 answer:
anzhelika [568]3 years ago
8 0

Answer:

I think it is C) Newton's 2nd Law. Bob is pulling the heavier load. He needs a greater force to move as fast as Bill.

You might be interested in
How many minutes will it take you to finish a 5 km race at an average speed of 7.0m/s?
slava [35]

Answer:

11.9 minutes

Explanation:

The journey is 5000 meters long. The time it takes in seconds for the journey at this speed is 5000/7 =714 seconds.

714/60=time in minutes =11.9 minutes approximately.

6 0
3 years ago
A temperature of 200 degrees Fahrenheit is equivalent to approximately A.93.3 degrees Celsius B. 232 degrees Celsius C. 37.8 deg
bija089 [108]

Answer:

you can use G.oogle for this question.

6 0
3 years ago
A projectile is launched horizontally from a 20-m tall edifice with a vox of 25 m/s. How long will it take for the projectile to
NISA [10]

Answer:

a) First let's analyze the vertical problem:

When the projectile is on the air, the only vertical force acting on it is the gravitational force, then the acceleration of the projectile is the gravitational acceleration, and we can write this as:

a(t) = -9.8m/s^2

To get the vertical velocity we need to integrate over time to get:

v(t) = (-9.8m/s^2)*t + v0

where v0 is the initial vertical velocity because the object is thrown horizontally, we do not have any initial vertical velocity, then v0 = 0m/s

v(t) = (-9.8m/s^2)*t

To get the vertical position equation we need to integrate over time again, to get:

p(t) = (1/2)*(-9.8m/s^2)*t^2 + p0

where p0 is the initial position, in this case is the height of the edifice, 20m

then:

p(t) = (-4.9m/s^2)*t^2+ 20m

The projectile will hit the ground when p(t) = 0m, then we need to solve:

(-4.9m/s^2)*t^2+ 20m = 0m

20m = (4.9m/s^2)*t^2

√(20m/ (4.9m/s^2)) = t = 2.02 seconds

The correct option is a.

b) The range will be the total horizontal distance traveled by the projectile, as we do not have any horizontal force, we know that the horizontal velocity is 25 m/s constant.

Now we can use the relationship:

distance = speed*time

We know that the projectile travels for 2.02 seconds, then the total distance that it travels is:

distance = 2.02s*25m/s = 50.5m

Here the correct option is a.

c) Again, the horizontal velocity never changes, is 25m/s constantly, then here the correct option is option b. 25m/s

d) Here we need to evaluate the velocity equation in t = 2.02 seconds, this is the velocity of the projectile when it hits the ground.

v(2.02s) =  (-9.8m/s^2)*2.02s = -19.796 m/s

The velocity is negative because it goes down, and it matches with option d, so I suppose that the correct option here is option d (because the sign depends on how you think the problem)

4 0
3 years ago
A 1100 kg car rounds a curve of radius 68 m banked at an angle of 16 degrees. If the car is traveling at 95 km/h, will a frictio
Mariulka [41]

Answer:

Yes. Towards the center. 8210 N.

Explanation:

Let's first investigate the free-body diagram of the car. The weight of the car has two components: x-direction: towards the center of the curve and y-direction: towards the ground. Note that the ground is not perpendicular to the surface of the Earth is inclined 16 degrees.

In order to find whether the car slides off the road, we should use Newton's Second Law in the direction of x: F = ma.

The net force is equal to F = \frac{mv^2}{R} = \frac{1100\times (26.3)^2}{68} = 1.1\times 10^4~N

Note that 95 km/h is equal to 26.3 m/s.

This is the centripetal force and equal to the x-component of the applied force.

F = mg\sin(16) = 1100(9.8)\sin(16) = 2.97\times10^3

As can be seen from above, the two forces are not equal to each other. This means that a friction force is needed towards the center of the curve.

The amount of the friction force should be 8.21\times 10^3~N

Qualitatively, on a banked curve, a car is thrown off the road if it is moving fast. However, if the road has enough friction, then the car stays on the road and move safely. Since the car intends to slide off the road, then the static friction between the tires and the road must be towards the center in order to keep the car in the road.

5 0
4 years ago
Explain the advantage of operating a motor vehicle that is 20% efficient instead of one that is 10% efficient
Jet001 [13]
Save money on fuel and go for longer
5 0
3 years ago
Other questions:
  • Calculate the velocity of a sound wave if the frequency is 5 E 5 Hz and the wavelength is 0.001 m.
    9·1 answer
  • What happens to the momentum of an object when velocity is kept the same and the mass is increased?
    14·1 answer
  • The sartorius muscle is the longest muscle in the human body. Where is it located?
    11·1 answer
  • Why is operating system is pivotal in teaching and learning
    11·1 answer
  • A solid cylinder with a radius of 73.3 cm and a mass of 2.33 kg accelerates
    8·1 answer
  • Why is the earth Round
    12·2 answers
  • Which of the following are examples of projectile not
    11·1 answer
  • Think about the force that causes a planet to orbit the Sun and the direction of this
    8·1 answer
  • 1. Which description defines pseudoscience?
    9·1 answer
  • I need help please ;)
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!