Q4) A static object at an altitude of 30 m from the surface of the ground has a potential energy of 1470 J as shown in Fig. (2). If the body falls down, neglecting the air resistance, calculate: 1) The kinetic energy of the body and its potential energy at a height 20 m from the ground surface. 2) The velocity of the body at the moment of collision with the ground.

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Q4) A static object at an altitude of 30 m from the surface of the ground has
a potential energy of 1470 J as shown in Fig. (2). If the body falls down,
neglecting the air resistance, calculate:
1) The kinetic energy of the body and its potential energy at a height 20 m
from the ground surface.
2) The velocity of the body at the moment of collision with the ground.
KE = ?
PE = ?
h = 30 m
h = 20 m
v = ?
Ground surface
Transcribed Image Text:Q4) A static object at an altitude of 30 m from the surface of the ground has a potential energy of 1470 J as shown in Fig. (2). If the body falls down, neglecting the air resistance, calculate: 1) The kinetic energy of the body and its potential energy at a height 20 m from the ground surface. 2) The velocity of the body at the moment of collision with the ground. KE = ? PE = ? h = 30 m h = 20 m v = ? Ground surface
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