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
andrey2020 [161]
2 years ago
13

What is the value of work done on an object when a 0.1x102–newton force moves it 30 meters and the angle between the force and t

he displacement is 25°?
A) 2.7 × 102 joules

B) 3.0 × 102 joules

C) 7.5 × 102 joules

D) 0 joules
Physics
2 answers:
Arturiano [62]2 years ago
8 0

Answer:

A) 2.7 × 102 joules

Explanation:

The work done by a constant force is given by:

W=Fd cos \theta

where

F is the magnitude of the force

d is the distance over which the force is applied

\theta is the angle between the direction of the force and the displacement

In this problem, we have:

F=0.1 \cdot 10^2 N

d=30 m

\theta=25^{\circ}

Substituting into the equation, we find the work done

W=Fd cos \theta=(0.1 \cdot 10^2 N)(30 m)(cos 25^{\circ})=271 J=2.7 \cdot 10^2 J

Ganezh [65]2 years ago
4 0
The Answer to the question above is A. 2.7 x 102 joules.
You might be interested in
What is the momentum of a 20 kg object traveling at a rate of 5 m/s
Arlecino [84]
100 as momentum=mass×velocity
3 0
2 years ago
A projectile is launched from ground level at angle u and speed v0 into a headwind that causes a constant horizontal acceleratio
ale4655 [162]

Answer:

Explanation:

Given

Launch angle =u

Initial Speed is v_0

Horizontal acceleration is a_x=a

At maximum height velocity is zero therefore

v_f=v_i-gt

0=v_0\sin u-gt

t=\frac{v_0\sin u}{g}

Total time of flight T=2t=\frac{2v_0\sin u}{g}

During this time horizontal range is

R=v_o\cos u\cdot 2t-\frac{a(2t)^2}{2}

R=\frac{2v_0^2\sin u\cos u}{g}-\frac{2av_0^2\sin ^u}{g^2}

For maximum range \frac{\mathrm{d} R}{\mathrm{d} u}=0

\frac{\mathrm{d} R}{\mathrm{d} u}=\frac{2v_0^2\cos 2u}{g}-\frac{4av_0^2\sin u\cos u}{g^2}

\frac{\mathrm{d} R}{\mathrm{d} u}=\frac{2v_0^2}{g}\left [ \cos 2u-\frac{a}{g}\sin 2u\right ]=0

\tan 2u=\frac{g}{a}

u=\frac{1}{2}tan ^{-1}\frac{g}{a}

(b)If a =10% g

a=0.1g

thus u=\frac{1}{2}tan^{-1}\frac{g}{0.1g}

u=42.14^{\circ}

7 0
2 years ago
A spring is hung from the ceiling. When a block is attached to its end, it stretches 2.6 cm before reaching its new equilibrium
Kaylis [27]

Answer:

f = 3.09 Hz

Explanation:

This is a simple harmonic motion exercise where the angular velocity is

         w² = \frac{k}{m}

to find the constant (k) of the spring, we use Hooke's law with the initial data

         F = - kx

where the force is the weight of the body that is hanging

        F = W = m g

we substitute

        m g = - k x

        k = - \frac{m g}{x}

we calculate

        k = - \frac{9.8 m}{- 2.6 \ 10^{-2}}

        k = 3.769 10² m

we substitute in the first equation

       w² = \frac{ 3.769 \ 10^2 \ m }{m}

       w = 19.415 rad / s

angular velocity and frequency are related

       w = 2πf

        f = \frac{w}{2\pi }

        f = 19.415 / 2pi

        f = 3.09 Hz

7 0
2 years ago
Respond to the following based on your reading.
padilas [110]

Answer:

I would love to help but I don't know I'm so sorry

5 0
1 year ago
Prima problema este urgent
Aleonysh [2.5K]

Answerana alyom kint gahda amshi

Explanation:

5 0
2 years ago
Other questions:
  • What feature on earth plays a role in the carben cycle similar to that of forests? explain
    10·1 answer
  • What does the negative sign in F = –kx mean?
    11·1 answer
  • What is the the correct answer ? Please help !
    8·2 answers
  • Sully uses a battery and a coil of wire to create an electromagnet. Using the same materials, if he wants to increase the streng
    9·2 answers
  • How many kg are in 3000netons​
    13·1 answer
  • A constant current of I = 15 A exists in a solenoid whose inductance is L = 2.8 H. The current is then reduced to zero in a cert
    7·1 answer
  • Every time your cats paw hits her toy string, it swings away from her. How does this demonstrate Newton’s third law of motion?
    5·1 answer
  • 3.) A 20cm long tube has an inner diameter of 0.85cm and an outer
    7·1 answer
  • If a apple has a a weight of 1 N, what is the mass of the apple?
    11·1 answer
  • a car with a mass of 1000-liogram accerlerates from rest, and travels a distanceof 48 meters druing its first 4.0 seconds of uni
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!