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
WITCHER [35]
3 years ago
13

If the kinetic energy of the 40kg box is 784 J, what is the velocity before it strikes the ground?

Physics
1 answer:
mamaluj [8]3 years ago
4 0

Answer:

Explanation:

KE=\frac{1}{2}mv^2

784=\frac{1}{2}(40)v^2

784=20v^2

39.2=v^2

v=6.26m/s

You might be interested in
A frog is at the bottom of a 17-foot well. Each time the frog leaps, it moves up 3 feet. If the frog has not reached the top of
docker41 [41]

Answer:

The frog takes 8 jumps to reach top of well

Explanation:

Given data

Frog at bottom=17 foot

Each time frog leaps 3 feet

Frog has not reached the top of the well, then the frog slides back 1 foot

To Find

Total number of leaps the frog needed to escape from well

Solution

in 1 jump distance jumped=3+(-1)

                                           =2 feet

                                           =2×1 feet

The "-1" is because the frog goes back

Now After 2 jumps the distance jumped as:

                     Distance Jumped=2+2

                     Distance Jumped=2*2

                                                   =4 feet

Similarly after 7 jumps

                    Distance Jumped=2+2+......+2

                    Distance Jumped=2*7

                                                 =14 feet

Now after 8th jump the frog climbs but doesnot slide back as it is reached to the top of well.

So

              Distance Jumped=(Distance Jumped after 7 jumps)+3

                                           =14+3

                                           =17 feet

The frog takes 8 jumps to reach top of well                

7 0
3 years ago
A body of mass 5 kg has a velocity<br><br><br>20 MS <br><br>-1 its Momentum is​
Anon25 [30]

Answer:

Momentum is 100 kg.m/s

Explanation:

given

mass, m = 5 kg

velocity, v = 20 m/s

To find : momentum (P)

We know that momentum is given by equation:

p = mv

  = 5 kg x 20 m/s

  = 100 kg.m/s

7 0
3 years ago
A 5,257 kg rocket blasts off to the moon with an acceleration of 76 m/s ^2 what is the net force on the rocket
frutty [35]

Newton's subsequent law expresses that power is corresponding to what exactly is needed for an object of consistent mass to change its speed. This is equivalent to that item's mass increased by its speed increase.

We use Newtons, kilograms, and meters each second squared as our default units, albeit any proper units for mass (grams, ounces, and so forth) or speed (miles each hour out of every second, millimeters per second², and so on) could unquestionably be utilized also - the estimation is the equivalent notwithstanding.

Hence, the appropriate answer will be 399,532.

Net Force = 399532

7 0
3 years ago
______________ are chemicals in the body affecting how you feel.
7nadin3 [17]

Answer:

emotions

Explanation:

emotions are how you feel and can happen any time

Hope it helps <333

3 0
2 years ago
Read 2 more answers
What is the metric unit of measuring the volume of liquids?
-Dominant- [34]
Litres or millilitres
6 0
3 years ago
Other questions:
  • A 9.08 m ladder with a mass of 23.8 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upw
    14·1 answer
  • Experiment: Group 1 drinks 500 mL of coffee a day.
    14·1 answer
  • How do you get 5 minutes to seconds
    5·2 answers
  • What do we have seasons on earth
    8·1 answer
  • Nicolo` works on weekends at a Slow Food Parlor. He fills a pitcher full of Cola, places it on the counter top and gives the 2.6
    12·1 answer
  • On the surface of Earth, a spacecraft has a mass of 2.00 x 104 kilograms. What is the mass of the spacecraft at a distance of on
    15·1 answer
  • Which of the following is true for both gas planets and terrestrial planets? Please Answer ASAP!!
    14·1 answer
  • PLS I NEED HELP!!!!!!
    12·1 answer
  • What work is done by a forklift raising a 574 kg crate to a height of 1.3m in a time of 2.0 seconds?
    10·1 answer
  • Increase of greenhouse gases, due to human activity, is melting sea ice at the poles. This causes changes in climate. Which thre
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!