That is because work requires energy. According to the law of conservation of energy, it cannot be created or destroyed. When doing work, energy change forms and gets transferred to the object until it is released.
for example, when you lift up an object and place it on a higher elevation, you transferred energy to it and gave it potential energy. The potential energy is transformed into kinetic energy when the object falls down, and if it hits a surface, the energy will scatter, vibrating the areas around it and producing sound.
Also, work= force X distance. The energy does not go away, but rather get changed into some other form of energy
42- C
43- A
44- C
45- A
46- B
47- D
Answer:
Newton's Second Law of Motion states that a force on an object is equal to the mass of the object multiplied by its acceleration (F=ma). ... When the punter kicks the ball, his foot exerts a force on the ball. The football then exerts an equal amount of force in the opposite direction on the kicker's foot.
Answer:
the object is moving with constant acceleration
Explanation:
The motion refers to the change in the position of an object. It is described with respect to distance, displacement, velocity, speed, acceleration, and time. Momentum measures the motion of a body.
Shifting a block is an example of motion.
Force refers to the push or pulls on an object with mass. It results in a change in its velocity.
If a constant net force acts on an object, <u>the object moves with constant acceleration</u>
Answer:
τ = 11.25 Nm
Explanation:
Given,
Mass of wrench, m = 1.10 Kg
Force on the wrench, F = 150 N
position of force, r = 15 cm = 0.15 m
angle of nut = 30°
We know,
torque = Force x distance
F = 150 sin 30°
F = 75 N
τ = 75 x r
τ = 75 x 0.15
τ = 11.25 Nm
Torque at the center of the nut is equal to 11.25 N.
