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
PilotLPTM [1.2K]
3 years ago
14

. How much work is done in lifting an object that has a mass of 5kg a vertical distance of 2m?

Physics
1 answer:
malfutka [58]3 years ago
7 0
<h3>Answer:</h3>

100 Joules

<h3>Explanation:</h3>

The question is testing on how to calculate work done;

We are given;

  • Mass of an object is 5 kg
  • Distance moved is 2 m

We are required to calculate the amount of work done.

How do we calculate work done?

  • Work done is the product of force and distance.
  • Therefore without distance covered no work is done.
  • Work done = Force × distance
  • Additionally, it is measured in joules or Nm

In this case;

Force = mass × 10 N/kg

         = 5 kg × 10 N/kg

         = 50 N

Therefore;

work done = 50 N × 2 m

                  = 100 Joules

Thus, the work done in lifting the object is 100 Joules

You might be interested in
A ball whose mass is 0.4 kg hits the floor with a speed of 4 m/s and rebounds upward with a speed of 2 m/s. If the ball was in c
e-lub [12.9K]

Answer:

Explanation:

We shall apply concept of impulse

Impulse = Force x time

= Force x 2 x 10⁻³ N.s

impulse = change in momentum

change in momentum

= .4 x 4 - ( - .4 x 2 )

= 2.4

Force x 2 x 10⁻³  = 2.4

Force = 2.4 /  2 x 10⁻³

= 1.2 x 10³ N .

average magnitude of the force exerted by floor = 1.2 x 10³ N

If R be reaction force by earth

R - mg = 1.2 x 10³

R = 1.2 x 10³ + mg

= 1200 + .4 x 9.8

= 1200 +3.92

= 1203 .92 N .

7 0
4 years ago
A flywheel with radius of 0.300 m starts from rest and accelerates with a constant angular acceleration of 0.400 rad/s2.For a po
oksian1 [2.3K]

Answer:

0.12\ m/s^2

Explanation:

Given that,

The radius of a flywheel, r = 0.3 m

Angular acceleration of a flywheel, \alpha =0.4\ rad/s^2

We need to find the magnitude of the tangential acceleration after 2.00 s of acceleration.

The relation between the tangential and angular acceleration is given by :

a_t=r\alpha \\\\a_t=0.3\times 0.4\\\\a_t=0.12\ m/s^2

So, the required magnitude of tangential acceleration is 0.12\ m/s^2.

6 0
3 years ago
We intend to observe two distant equal brightness stars whose angular separation is 50.0 × 10-7 rad. Assuming a mean wavelength
san4es73 [151]

Answer:

13.4cm

Explanation:

According to Rayleigh’s criterion the angular resolution to distinguish two objects is given by:

\theta=1.22\frac{\lambda}{b}

θ = 50.0*10^-7 rad

λ: wavelength of the light = 550nm

b = diameter of the objective

By doing b the subject of the formula and replacing the values of the angle and wavelength you obtain:

b=1.22\frac{\lambda}{\theta}=1.22\frac{550*10^{-9}m}{50.0*10^{-7}rad}=0.134m=13.4cm

hence, the smallest diameter objective lens is 13.4cm

8 0
3 years ago
Read 2 more answers
1 poir
djverab [1.8K]

Answer:

D) 735 J(oules)

Explanation:

Work is defined as force * distance

Force is defined as mass * acceleration

Given a mass of 15 kg and a gravitational acceleration of 9.8 m/s² since the box is being lifted up, the force being applied to the box is 15 kg * 9.8 m/s² = 147 N

Since the distance is 5 meters, the work done is 147 N * 5 m = 735 N/m = 735 J, making D the correct answer.

4 0
3 years ago
Qwertyuiop hhffhhhhf fiuefhasuhs afbauyhsbvzskhbdv
mars1129 [50]

Answer:

gfhvgtrtjrgvfjrrgfrfftuyrisnhdvfcgfridkjhsybvvtfvjfcgvwjfccegvghcvgrcgvrekgvrkgvkvvrvkvfgkerruuyti

4 0
3 years ago
Read 2 more answers
Other questions:
  • A coil of wire with 60 turns lies on the plane of the page, and a uniform magnetic field points into the page with a strength of
    7·1 answer
  • At the particle level, the weakest of the fundamental forces is:
    9·2 answers
  • Model the concrete slab as being surrounded on both sides (contact area 24 m2) with a 2.1-m-thick layer of air in contact with a
    14·1 answer
  • When an object oscillating in simple harmonic motion is at its maximum displacement from the equilibrium position, which of the
    15·1 answer
  • An object is dropped from a 32 m tall building. How fast will it be going when it
    13·1 answer
  • A 30-cm-diameter, 4-m-high cylindrical column of a house made of concrete ( k = 0.79 W/m⋅K, α = 5.94 × 10 −7 m2/s, rho = 1600kg
    10·1 answer
  • What type of detection device tracks nuclear particles in a super heated liquid and the end result is swirls on a colored backgr
    12·2 answers
  • What happens in the gray zone between solid and liquid?-,-​
    15·1 answer
  • the plane prepares to land. its velocity changes from 155 m/s to 140ms over 2 minutes calculate the acceleration of the plane
    15·1 answer
  • How can magnetic properties of a magnet be destroyed​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!