Answer:
6.41 s
Explanation:
Under constant acceleration we know that
average velocity × time taken = displacement
t = 6.41 s
The proof of used equation is given in the attachment.
A crane at a construction site lifts a concrete block with a mass of m = 344 kg from the ground to the top of a building with a
1 answer:
Answer: Work that the motor of the crane do is 61122 joules.
Explanation:
Work is defined as the force resulting into displacement of an object.
w = work done
m= mass of object = 334 kg
g = acceleration due to gravity =
h = height of an object = 18.3 m
Putting in the values:
Thus work that the motor of the crane do is 61122 joules
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Answer:
Two objects will have the equal velocities but the forces on both of them will not be equal. The equal velocities of these objects are due to their equal acceleration.
Explanation:
From the newton's equation
so here we can say that velocity does not depends on the mass.
The acceleration of both objects will be same but not the forces because
F = Ma
As the force is depending on the mass so it will not be the same for both objects.
Answer:
23 mi
Explanation:
Let us first record all the values we have
acceleration = 4 ft/s
max speed = 90 mi/hr * 1 hr/3600s * 5280 ft/1 mi = 132 ft/s
We can use the equation of linear motion since acceleration is constant
distance covered = distance during acceleration + distance during costant
velocity
distance in miles = 120 978 ft * 1 mi/5280 ft = 22.9125 mi ≈ 23 mi