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Tema [17]
3 years ago
14

A 0.50-kilogram frog is at rest on the bank surrounding a pond of water. As the frog leaps from the bank, the magnitude of the a

cceleration of the frog is 4.0 meters per second².
Physics
1 answer:
marysya [2.9K]3 years ago
5 0

Complete question:

A 0.50 kilogram frog is at rest on the bank surrounding a pond of water. As the frog leaps from the bank, the magnitude of the acceleration of the frog is 4.0 meters per second^2. Calculate The magnitude of the net force exerted on the frog as it leaps.

Answer:

2.0N

Explanation:

Given that,

Mass, m of the frog = 0.5 kg

The acceleration of the frog = 4.0 m/s².

We have been asked To find,

The magnitude of the net force exerted on the frog as it leaps.

So

We calculate this using the formula below :

F = ma

When we insert the values into the formula, we have:

F = 0.5 kg × 4 m/s²

F = 2.0 N

Therefore, the magnitude of net force is 2.0 N.

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A 3.00-kg object has a velocity 16.00 i ^ 2 2.00 j ^2 m/s.
trapecia [35]

Answer:

390 J

Explanation:

m = 3 kg

u = 16 i + 2 j

(a) Magnitude of velocity = \sqrt{16^{2}+2^{2}} = 16.1245 m/s

KEi = 1/2 m v^2 = 0.5 x 3 x 16.1245 = 390 J

(b) v = 18 i + 14 j

Magnitude of velocity =  \sqrt{18^{2}+14^{2}} = 22.804 m/s

KEf = 1/2 m v^2 = 0.5 x 3 x 22.804 = 780 J

According to the work energy theorem

Work done = change in KE = KEf - KEi = 780 - 390 = 390 J

8 0
4 years ago
Along the remote Racetrack Playa in Death valley, California,stones sometimes gouge out prominent trails in the desert floor, as
MArishka [77]

Answer:

Explanation:

given ;

  • coefficient of kinetic friction = 0.80
  • mass m = 26kg
  • considering the force acting in horizontal direction and from newton's 2nd law of motion;
  • for vertical motion = Fn - mg = 0
  • for horizontal motion = F = ma + miu mg = m( a + miu.g)
  • but a = 0
  • therefore, F = miu mg where g = 9.81m/s^2
  • plugging the values into the equation;
  • F = 0.80 x 9.81 x 26

Horizontal force = 204.05N

3 0
3 years ago
Which object had more potential energy when it was lifted to a distance of 10 meters? Show your
vitfil [10]
When all of the objects are lifted to the same height, the object
that has the most mass also has the most potential energy.

If we knew anything about the masses of the objects in this question,
then we could be more specific.

Calculation:

    <em>Potential energy = (mass) x (gravity) x (height above the reference level)</em>.
7 0
3 years ago
Một dây dẫn bằng nikelin có điện trở suất là ρ = 0,4.10-6 Ωm, dài l = 5m, tiết diện
MAXImum [283]

Answer:

Một dây dẫn bằng nikelin dài 20m, tiết diện 0.5mm2 điện trở suất của nikelin là 0,4.10^-6 ôm/m. tính điện trở dây dẫn

6 0
3 years ago
Zeros are always considered significant digits when they are to the left of the decimal point
maksim [4K]

Answer:

Zeros to the left of a decimal can be insignificant place holders, such as in 0.043 (two significant figures).

They can be significant if they are between two digits who themselves are significant, such as in 101.000 (three significant figures).

In the case of a number like 1,000 we can see there is only one significant figure. The zero digits are not between sigfigs.

7 0
4 years ago
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