Answer:
In a collision, the velocity change is always computed by subtracting the initial velocity value from the final velocity value. If an object is moving in one direction before a collision and rebounds or somehow changes direction, then its velocity after the collision has the opposite direction as before.
Boyle's law is modeled by the equation p1v1=p2v2.
The correct answer for above statement is:
A. Heat energy is released by the substance.
Explanation:
The reverse of deposition is sublimation and therefore generally deposition is termed desublimation. One example of deposition is that the method by that, in sub-freezing air, water vapor changes on to ice while not initial changing into a liquid.It is a process of releasing energy.
Answer:
Weight of the runner is 60 kilograms
Explanation:
Momentum is the product of weight and velocity.
The formula is : p=mv where m is mass in kg and v is velocity in m/s
Given in the question ;
v= 20 m/s and p=1200 kg*m/s
Applying the formula as;
p= mv
1200 = m * 20
1200/20 = m
60 kg = m
Answer:
100kgms⁻¹
Explanation:
Given parameters:
Mass of the sled = 20kg
Velocity of the sled = 5m/s
Unknown:
Momentum of the sled = ?
Solution:
The momentum of a body is the quantity of motion such a body possesses. Due to this;
Momentum = mass x velocity
Now insert the parameters and solve;
Momentum = 20 x 5 = 100kgms⁻¹
