Answer:
A.) 12.5 J
B.) 12.5 J
C.) 7.1 m/s
Explanation:
Given that a 0.5 kg object, initially at rest, is pulled to the right along a frictionless horizontal surface by a constant horizontal force of 25 N for a distance of 0.5m.
a. What is the work done by the force?
Work done = force × distance
Work done = 25 × 0.5
Work done = 12.5 J
b. What is the change in the kinetic energy of the block?
Work done = energy
Change in Kinetic energy = work done
Change in kinetic energy = 12.5 J
c. What is the speed of the block after the force is removed?
Kinetic energy = 1/2mV^2
12.5 = 1/2 × 0.5 × V^2
25 = 0.5V^2
V^2 = 25/0.5
V^2 = 50
V = 7.1 m/s
b. fall over once you overcome its inertia
c. push against you with equal force
d. heat up due to energy transfer
c. push against you with equal force
Newton's third law simply states that for every action there is an equal and opposite reaction.
So, if object A acts a force upon object B, then object B will exert an opposite yet equal force upon object A.
Newton's third law of motion describes that,
Forces always act in equal but opposite pairs.
Another way of saying this is for every action, there is an equal but opposite reaction.
This means that when you push on a wall, the wall pushes back on you with a force equal in strength to the force you exerted.
A person pushes against a wall (action force), and the wall exerts an equal and opposite force against the person (reaction force).
Therefore,
According to Newton's third law of motion, if you push against a wall, the wall will push against you with equal force.
Learn more about Newton's third law of motion here:
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C. push against you with equal force
B. exothermic
C. isothermic
D. endothermic
E. all of the above
Answer : The correct option is, (D) Endothermic
Explanation :
Adiabatic : It is a process in which a heat is constant. That means no heat is lost or gained by the system.
Isothermic : It is a process in which a temperature is constant.
Exothermic : It is a process in which heat released from system to surrounding. In this process, surrounding temperature increases and system temperature decreases.
Endothermic : It is a process in which heat required from the surrounding. In this process, surrounding temperature decreases and system temperature increases.
When the temperature of water increases from room temperature to 90ºC the process of heating the water is endothermic.
Hence, the correct option is, (D) Endothermic
Answer:
Increases the input force and decreases the input distance
Explanation:
When a force is applied over a given distance, there is an inverse relationship between the applied force and distance. Example is a tommy bar, when the length increases the force required decreases. This principle is applied to this wrench.
It is B, I honestly didn't know
Answer:
480 mph
Explanation:
speed = 60 mph
time = 8 hours
distance = speed*time
= 60*8
= 480 mph
distance and the speed.
time and the direction.
direction and speed.
Answer:
direction and speed.
Explanation: