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
zheka24 [161]
3 years ago
13

Jake drags a sled of mass 18 kg across the snow. The sled is attached to a rope that he pulls with a force of 70 N at an angle o

f 40°. If there is no friction, what is the normal force acting on the sled?

Physics
2 answers:
Advocard [28]3 years ago
8 0
If the 30 N on the rope were pulled straight up, it would offset the force of gravity ( m g = 10 kg * 9.8 N/kg = 98 N) , leaving a net force up from the ground on the sled of 98-30 = 68 N. Since the rope is pulled at the angle of 25o, only part of the force is in the upward direction, (30N)(sin(25) = (30)(.423) = 12.7. So the net force becomes 98 N down offset by 12.7 up or 98-12.7 = 85.3 N. Ah, there it is: C.
Maurinko [17]3 years ago
4 0

Answer: The normal force acting on the sled 131.4048 Newtons.

Explanation:

On breaking up force of 70 N into vertical and horizontal components:

Vertical components:f\cos\theta

Horizontal components:f\sin\theta

The normal force is force acting perpendicular on an object.It is a balanced force.

mg=N+f\sin\theta

N=mg-f\sin\theta=18 kg\times 9.8 m/s^2-70 N\times 0.6427=131.4048 N

The normal force acting on the sled 131.4048 Newtons.

You might be interested in
Suppose 1 kg of Hydrogen is converted into Helium. a) What is the mass of the He produced? b) How much energy is released in thi
morpeh [17]

Answer:

a) m = 993 g

b) E = 6.50 × 10¹⁴ J

Explanation:

atomic mass of hydrogen = 1.00794

4 hydrogen atom will make a helium atom = 4 × 1.00794 = 4.03176

we know atomic mass of helium = 4.002602

difference in the atomic mass of helium = 4.03176-4.002602 = 0.029158

fraction of mass lost = \dfrac{0.029158}{4.03176}= 0.00723

loss of mass for 1000 g = 1000 × 0.00723 = 7.23

a) mass of helium produced = 1000-7.23 = 993 g (approx.)

b) energy released in the process

E = m c²

E = 0.00723 × (3× 10⁸)²

E = 6.50 × 10¹⁴ J

4 0
3 years ago
Read 2 more answers
. A dog walks 14 m to the east and then 20 m back to the west. What is the distance? What is the displacement?​
Crank

Answer:

Hi...

14-20=-6...displacement

14+20=34...distance

3 0
3 years ago
•<br> What happens to similar charged<br> particles and differently charged<br> particles
mixas84 [53]

Answer:

Like charges repel

Different charges attract

Explanation:

When particles of similar charges are brought together, they repel each other and increase the distance of separation. Repulsion occurs because both two electrons have negative electrical charge forcing their lines of force to repel. However, when particles of opposite charges are brought nearer to each other, they attract each other and reduce the distance of separation.

8 0
3 years ago
please help me guys please please please please please please please please please please please please please​
Maurinko [17]
Someone write the answers???

5 0
3 years ago
Read 2 more answers
About 10-15% of all galaxies are which shape?
myrzilka [38]
The answer is; Irregular.
4 0
3 years ago
Other questions:
  • Suppose a log's mass is 5 kg. After burning, the mass of the ash is 1 kg. explain what May have happened to the other 4 kg
    12·1 answer
  • What are real images? Are the upright or inverted?
    11·1 answer
  • An automobile engine develops a torque of 280 NxM at 3800 rpm. What is the power in watts and horsepower?
    14·1 answer
  • Sound waves travel at the rate of 343 m/s at 20°C. If a man standing 450 meters away from the wall of a canyon yells, “Hello,” h
    10·1 answer
  • When working with electric charges, what symbol is used in equations to represent the electric field of an object?
    15·2 answers
  • Abby is writing a biography of Isaac Newton. He was a brilliant English scientist who developed the law of universal gravitation
    5·1 answer
  • a small asteroid of mass 125 kg is orbiting a planet that has a mass of 3.52x 10^13 what is the radial distance between the aste
    15·1 answer
  • SCIENCE
    6·2 answers
  • Which plate is made up almost entirely of oceanic crust
    14·2 answers
  • To heat the water in the tank from 50°C to 58°C the immersion heater transfers
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!