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
Yanka [14]
3 years ago
7

How much work do you do when you push a shopping cart with a force of 20 N for a distance of 5m?

Physics
1 answer:
KiRa [710]3 years ago
6 0

Answer:

A.100J

Explanation:

Given parameters:

Force on car = 20N

Distance  = 5m

Unknown:

Work done  = ?

Solution:

Work done is the product of force and distance;

  Work done  = force x distance;

Insert given parameters and solve;

        Work done  = 20 x 5  = 100J

You might be interested in
How do electromagnetic forces work?
zlopas [31]
It attracts two charged particles which are separated by a definitive distance.......
4 0
4 years ago
An object starts at 11 m/s with an acceleration of 12 m/s? What is its velocity after 4.5 seconds?
marshall27 [118]

Answer:

65 m/s

Explanation:

v=v0+at <=> v = 11 + 12 t ∧ t = 4.5 s <=> v = 11 + 12×4.5 <=> v = 65 m/s

5 0
3 years ago
A 75-turn coil with a diameter of 6.00 cm is placed in a constant, uniform magnetic field of 1.00 T directed perpendicular to th
kolezko [41]

Answer:

The induced emf in the coil at the t = 5s is 6.363 mV

Explanation:

Given;

number of turns = 75

diameter of the coil = 6 cm

magnetic field strength = 1 T

new magnetic field strength = 1.30 T at t = 10.0 s

Area \ of \ coil = \frac{\pi d^2}{4} =  \frac{\pi *0.06^2}{4} = 0.002828 \ m^2

E.M.F = \frac{NA* \delta B}{\delta t}

Between 0 to 5 s, Induced emf is given as;

E.M.F = \frac{75*0.002828*(B_5-1)}{5}

Between 5 to 10 s, Induced emf is given as;

E.M.F = \frac{75*0.002828*(1.3-B_5)}{5}

Since the field increased at a uniform rate until it reaches 1.30 T at t = 10.0 s, the induced emf will also increase in uniform rate. And equal time interval will generate same increase in field strength.

B₅ -1 = 1.3 - B₅

2B₅ = 2.3

B₅ = 1.15 T

Thus, magnetic field at t = 5 is 1.15 T

E.M.F = \frac{75*0.002828*(1.3-1.15)}{5} = 6.363 \ mV

Therefore, the induced emf in the coil at the t = 5s is 6.363 mV

7 0
3 years ago
23. The force required to accelerate a 2.0-kilogram
Marianna [84]
Answer:
C) 8.0 N

Explanation:
F=m*a
4 0
3 years ago
How many molecular orbitals are present in the valence band of a sodium crystal with a mass of 7.90 g?
fgiga [73]
Number of atoms equal the number of molecular orbitals as each atom has 1 atomic orbital and 1 electron.

Therefore,
Number of atoms = (mass/molar mass)*Avogadro's number = (7.90/22.99)*1.36*10^23 = 4.67*10^22 atoms.

Then,
Number of molecular orbitals = 4.67*10^22
8 0
3 years ago
Other questions:
  • Which scientist first proposed physical laws to mathematically describe the effect of forces on the motions of bodies?
    10·2 answers
  • Why do we always only see one side of the moon?
    8·2 answers
  • If you just saw a shooting star and wanted to write about the moment, which would be the best type of poem to write? a haiku a n
    8·1 answer
  • How do resistors in parallel affect the total resistance?
    7·1 answer
  • Smaller bits of rock that pass through the atmosphere and slam into Earth's surface are called
    6·1 answer
  • Given s=1/2(v+u)t find t ​
    6·1 answer
  • As part of a study of the effects of urbanization, local scientists have taken many data samples over the course of 20 years. Th
    7·2 answers
  • A 60 kg person sits in a chair. How much does the earth pull on the person? (Acceleration due to gravity is -10m/s2) F = mxa → F
    11·1 answer
  • Why is it easier to swim in sea than in a pond or river?​
    6·2 answers
  • At what time did time begin???
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!