Answer:
the work done on the car by the applied force is 75 J.
Explanation:
Given;
initial velocity of the car, v = 4 m/s
applied force in opposite direction, F = 5N
initial position of the car, x₀ = 5 m
final position of the car, x₁ = 20 m
displacement of the car, Δx = x₁ - x₀ = 20 m - 5m
= 15 m
The work done on the car by the applied force is calculated as follows;
W = F.Δx
W = 5 x 15
W = 75 J
Therefore, the work done on the car by the applied force is 75 J.
Answer:
b. 48.0 g.
Explanation:
Given;
mass of the exoplanet, ![M_p = 3M_e](https://tex.z-dn.net/?f=M_p%20%3D%203M_e)
radius of the exoplanet, ![r_p = \frac{1}{4} r_e](https://tex.z-dn.net/?f=r_p%20%3D%20%5Cfrac%7B1%7D%7B4%7D%20r_e)
The acceleration due to gravity of the planet is calculated as;
![g_p = \frac{GM_p}{r_p^2} \\\\for \ Earth's \ surface\\\\g = \frac{GM_e}{r_e^2} \\\\G = \frac{gr_e^2}{M_e} = \frac{g_pr_p^2}{M_p} \\\\\frac{gr_e^2}{M_e} = \frac{g_p(\frac{r_e}{4}) ^2}{3M_e} \\\\\frac{gr_e^2}{M_e} = \frac{g_pr_e ^2}{16\times 3M_e} \\\\g = \frac{g_p}{48} \\\\g_p = 48 \ g](https://tex.z-dn.net/?f=g_p%20%3D%20%5Cfrac%7BGM_p%7D%7Br_p%5E2%7D%20%5C%5C%5C%5Cfor%20%5C%20Earth%27s%20%5C%20surface%5C%5C%5C%5Cg%20%3D%20%5Cfrac%7BGM_e%7D%7Br_e%5E2%7D%20%5C%5C%5C%5CG%20%3D%20%5Cfrac%7Bgr_e%5E2%7D%7BM_e%7D%20%3D%20%5Cfrac%7Bg_pr_p%5E2%7D%7BM_p%7D%20%5C%5C%5C%5C%5Cfrac%7Bgr_e%5E2%7D%7BM_e%7D%20%3D%20%5Cfrac%7Bg_p%28%5Cfrac%7Br_e%7D%7B4%7D%29%20%5E2%7D%7B3M_e%7D%20%5C%5C%5C%5C%5Cfrac%7Bgr_e%5E2%7D%7BM_e%7D%20%3D%20%5Cfrac%7Bg_pr_e%20%5E2%7D%7B16%5Ctimes%203M_e%7D%20%5C%5C%5C%5Cg%20%3D%20%5Cfrac%7Bg_p%7D%7B48%7D%20%5C%5C%5C%5Cg_p%20%3D%2048%20%20%5C%20g)
Therefore, the correct option is b. 48.0 g
Answer:
a: 19.6 meters b: 9.8meters per second
Explanation:
speed and object falls is 9.8 meters per second. 9.8 meter times 2 is 19.8 meters.
Answer:
The magnetic flux is generated when there is change in the magnitude of the magnetic field as well as its direction. ... If the magnetic field is parallel to the place of the area exposed then the magnetic flux generated is zero when the magnetic field is not zero.
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