4 J
B.
40 J
C.
400 J
D.
4000 J
The correct answer to the question is C) 400 J.
CALCULATION:
As per the question, the force applied on the block F = 40 N.
The distance travelled by the block S = 10 m.
We are asked to calculate the work done by the block.
The work done by a body under a force F is calculated as -
Work done W =
=
Here, is the angle between force and displacement.
If , then work done W =
= FS. [ cos0 = 1]
Hence, the work done by the block W = FS
= 40 N × 10 m
= 400 Joule. [ans]
Here, Joule is the unit of work.
Hence, the work done by the block s 400 Joule.
Answer:
Thus, the restoring force is - 12 a b.
Given:
Spring constant = 4 a
Stretched displacement = 3 b
To find:
Restoring force = ?
Formula used:
The restoring force is given by,
F = -k x
Where F = restoring force
spring constant = k = 4 a
stretched displacement = x = 3 b
Solution:
The restoring force is given by,
F = -k x
Where F = restoring force
spring constant = k = 4 a
stretched displacement = x = 3 b
F = - (4 a) (3 b)
F = - 12 a b
Thus, the restoring force is - 12 a b.
B. virtual, Inverted, and small
C. real, Inverted, and small
D. virtual, upright, and enlarged
Answer:
real,inverted,and small
The rock on the ground has more kinetic energy compared to the feather floating through the air, due to the force of gravity.
Kinetic energy is the energy of motion, and a moving object has kinetic energy. Potential energy, on the other hand, comes in several forms, such as gravitational potential energy. When comparing a feather floating through the air and a rock on the ground, we can say that the rock has more kinetic energy.
This is because the rock, when dropped, falls to the ground due to the force of gravity, gaining kinetic energy in the process. The feather, on the other hand, is floating through the air and not experiencing the same gravitational pull, thus having less kinetic energy than the rock.
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