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
BabaBlast [244]
3 years ago
14

two people, each with a mass of 70 kg, are wearing inline skates and are holding opposite ends of a 15m rope. One person pulls f

orward on the rope by moving hand over hand and gradually reeling in more of the rope. In doing so, he exerts a force of 35N [backwards] on the rope. This causes him to accelerate toward the other person. Assuming that the friction acting on the skaters is negligible, how long will it take for them to meet? Explain your reasoning.
Physics
1 answer:
Zina [86]3 years ago
5 0

Answer:

7.75 s

Explanation:

Newton's second law:

∑F = ma

35 N = (70 kg) a

a = 0.5 m/s²

Given v₀ = 0 m/s and Δx = 15 m:

Δx = v₀ t + ½ at²

(15 m) = (0 m/s) t + ½ (0.5 m/s²) t²

t = 7.75 s

You might be interested in
What is the speed of a 55.0 kg skydiver who has 7.81 x 104 J of kinetic energy?
KATRIN_1 [288]

Answer:

v=53.3m/s

Explanation:

Ek=1/2mv²

7.81×10⁴=1/2×55.0v²

v= the square root of 7.81×10⁴/0.5×55.0

v=53.3m/s

5 0
3 years ago
How is lithium fluoride and lithium chloride similar?
Blababa [14]

Answer:

Although odorless, lithium fluoride has a bitter-saline taste. Its structure is analogous to that of sodium chloride, but it is much less soluble in water. It is mainly used as a component of molten salts.

Explanation:

7 0
3 years ago
If it takes 150N of force to move a box 10 meters. what is the work done on the box?
sergeinik [125]

Answer:

1500 Joules

Explanation:

Work = Force x Distance

When multiplying by 10 you simply shift all the digits to the

left and append a 0 to the end.

so 150 x 10 = 1500 Joules

3 0
3 years ago
Read 2 more answers
A small, rocky particle that moves through space and strikes a planet or moon is referred to as a/an
taurus [48]
A small, rocky particle that moves through space and strikes a planet or moon is referred to as a meteorite. A meteorite is a substantial part of the wreckage from a root such as an asteroid including comet, It is described as a meteoroid before its collision. Meteorite's intensity can change from petite to remarkably big.

6 0
4 years ago
A frog has a pulmocutaneous artery and vein which compares to the human pulmonary artery and vein. What two organs do these bloo
xxTIMURxx [149]

Answer:

Explanation:

Pulmo - lungs

cutan - skin

artery - heart

Frogs breath through their skin oxygenating blood pumped from the heart.

The pulmonary artery connects heart and lungs in humans.

4 0
3 years ago
Other questions:
  • A disk is free to rotate about an axis perpendicular to the disk through its center. If the disk starts from rest and accelerate
    12·1 answer
  • Three charged particles are placed at each of three corners of an equilateral triangle whose sides are of length 4.0 cm. Two of
    10·1 answer
  • What is meant by saying that a wave has a low frequency?
    13·2 answers
  • 5. In 1947 Bob Feller, a pitcher for the Cleveland Indians, threw a baseball across the
    6·1 answer
  • To measure the amount of mass in an object, which piece of equipment would be used?
    5·2 answers
  • On earth, what is a child’s mass if the force of gravity on the child’s body is 100 N
    13·1 answer
  • A car is stopped for a traffic signal. When the light turns green, the car accelerates, increasing its speed from 0 to 5.40 m/s
    12·1 answer
  • A cat with a mass of 5.00 kg pushes on a 25.0 kg desk with a force of 50.0N to jump off. What is the force on the desk?
    7·1 answer
  • (only answer if you know the answer or I'll report) Solve it w the steps tysm​
    11·1 answer
  • The diagram shows a 1-newton metal disk resting on an index card that is balanced on top of a glass.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!