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ki77a [65]
3 years ago
11

Work done by a constant force in one dimension? With equation? And if possible also proof?

Physics
2 answers:
ahrayia [7]3 years ago
4 0
I agree with the other answer.
scZoUnD [109]3 years ago
3 0
One dimension means 0 movement as there are no axes of movement, so 0=0 and there is no easier equation than 0=0.  Please Mark Brainliest!!!
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Two objects moving with the same speed may not have the same velocity. Why?​
Nutka1998 [239]
Objects have the same velocity only if they are moving at the same speed and in the same direction. Objects moving at different speeds, in different directions, or both have different velocities.
4 0
1 year ago
The mean time between collisions for electrons in room temperature copper is 2.5 x 10-14 s. What is the electron current in a 2
Darya [45]

Answer:

1.87 A

Explanation:

τ = mean time between collisions for electrons = 2.5 x 10⁻¹⁴ s

d = diameter of copper wire = 2 mm = 2 x 10⁻³ m

Area of cross-section of copper wire is given as

A = (0.25) πd²

A = (0.25) (3.14) (2 x 10⁻³)²

A = 3.14 x 10⁻⁶ m²

E = magnitude of electric field = 0.01 V/m

e = magnitude of charge on electron = 1.6 x 10⁻¹⁹ C

m = mass of electron = 9.1 x 10⁻³¹ kg

n = number density of free electrons in copper = 8.47 x 10²² cm⁻³ = 8.47 x 10²⁸ m⁻³

i = magnitude of current

magnitude of current is given as

i = \frac{Ane^{2}\tau E}{m}

i = \frac{(3.14\times 10^{-6})(8.47\times 10^{28})(1.6\times 10^{-19})^{2}(2.5\times 10^{-14}) (0.01)}{(9.1\times 10^{-31})}

i  = 1.87 A

4 0
3 years ago
The greater the force squeezing 2 surfaces together, the smaller the
Dafna11 [192]

Answer:

False

Explanation:

It is false because the greater the force, the greater the friction.

5 0
3 years ago
Read 2 more answers
The density of a hippo is approximately 1030kg/m^3,so it sinks to the bottom of the freshwater lakes and rivers. A 1500kg hippo
hram777 [196]

Answer:

14,700 N

Explanation:

The hyppo is standing completely submerged on the bottom of the lake. Since it is still, it means that the net force acting on it is zero: so, the weight of the hyppo (W), pushing downward, is balanced by the upward normal force, N:

W-N=0 (1)

the weight of the hyppo is

W=mg=(1500 kg)(9.8 m/s^2)=14,700 N

where m is the hyppo's mass and g is the gravitational acceleration; therefore, solving eq.(1) for N, we find

N=W=14,700 N

8 0
4 years ago
An object that starts at a position of 5 m and travels for 3 seconds at a velocity of -9 m/s ends up at what position?
Rina8888 [55]

Answer:

Sorry don't know the answer

5 0
3 years ago
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