A stalled car is pushed with a force of 342N from rest. How far does the car travel in 12 seconds if it’s mass is 989kg
1 answer:
24.89m
Explanation:
Given parameters:
Force on car = 342N
Initial velocity = 0
Time taken = 12s
Mass of the car = 989kg
Unknown:
Distance covered by the car = ?
Solution:
To solve this problem, we simply use one of the appropriates equations of motions.
s = ut + at²
s is the distance
u is the initial velocity
t is the time taken
a is the acceleration of the car.
To find the acceleration;
Acceleration = =
Acceleration = 0.35m/s²
Inputting the parameters in the equation:
s = 0 x 12 + x 0.35 x 12² = 24.89m
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Answer:
True
The escape speed from the Moon is much smaller than from Earth.
Explanation:
The escape speed is defined as:
(1)
Where G is the gravitational constant, M is the mass and r is the radius.
The mass of the Earth is and its radius is
Then, replacing those values in equation 1 it is gotten.
For the case of the Moon:
Hence, the escape speed from the Moon is much smaller than from Earth.
Since it has a smaller mass and smaller radius compared to that from the Earth.