cause an object to accelerate in a direction opposite to the unbalanced force
Explanation:
An unbalanced force is defined as any force that causes an object to accelerate in a direction opposite to the unbalanced force.
The unbalanced force is the net or resultant force describe in newton's second law of motion.
In the first law, it is the external force that causes the motion of a body to change.
Unbalanced forces can cause body to either accelerate in the direction of the force or in an opposite direction of the force.
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Newton laws brainly.com/question/11411375
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Answer:
The displacement of the car after 6s is 43.2 m
Explanation:
Given;
velocity of the car, v = 12 m/s
acceleration of the car, a = -1.6 m/s² (backward acceleration)
time of motion, t = 6 s
The displacement of the car after 6s is given by the following kinematic equation;
d = ut + ¹/₂at²
d = (12 x 6) + ¹/₂(-1.6)(6)²
d = 72 - 28.8
d = 43.2 m
Therefore, the displacement of the car after 6s is 43.2 m
Answer:
The kinetic energy increases 4 times
Explanation:
Given,
The mass of the car, m = 1500 Kg
The speed of the car doubles from 50 Km/h to 100 Km/h
The kinetic energy at 50 Km/h
K.E = ½mv²
= ½ x 1500 x 50²
= 1875000 J
The kinetic energy of the car at 100 Km/h
K.E = ½mv²
= ½ x 1500 x 100²
= 7500000 J
Hence, the final K.E is 4 times the initial K.E
Answer:
![\phi=1.55 [eV]](https://tex.z-dn.net/?f=%5Cphi%3D1.55%20%5BeV%5D)
Explanation:
We can use the work function equation for a photoelectric experiment:
- h is the plank constant
- c is the speed of light
- λ is the wave length
- K is the kinetic energy (or K=eΔV)
So we will have:
![\phi=3.64*10^{-19}[J]-0.728 [eV]](https://tex.z-dn.net/?f=%5Cphi%3D3.64%2A10%5E%7B-19%7D%5BJ%5D-0.728%20%5BeV%5D)
![\phi=(3.64*10^{-19}[J]*\frac{1eV}{1.6*10^{-19}[J]})-0.728 [eV]](https://tex.z-dn.net/?f=%5Cphi%3D%283.64%2A10%5E%7B-19%7D%5BJ%5D%2A%5Cfrac%7B1eV%7D%7B1.6%2A10%5E%7B-19%7D%5BJ%5D%7D%29-0.728%20%5BeV%5D)
![\phi=2.28 [eV] - 0.728 [eV]](https://tex.z-dn.net/?f=%5Cphi%3D2.28%20%5BeV%5D%20-%200.728%20%5BeV%5D)
I hope it helps you!
Answer:
100,800 Jkg
The heat that is used to change the state of a mater is called latent heat.
In this case it is converting ice to water and it is called latent heat of fusion.
It is given by:
Heat = mc
where m is the mass of ice and l is the specific latent heat of fusion of ice.
l = 0.336 MJ
Heat = 0.3 × 0.336 MJ
= 0.3 × 0.336 × 10⁶
= 100,800 Jkg
