Answer:
A. Speed is a scalar quantity and velocity is a vector quantity.
Explanation:
A scalar quantity is one that consists of only a numerical value.
Speed is a scalar quantity because only the instantaneous value is indicated, for example the speedometer of a car that tells you your speed at the moment but not where you are going or in what direction are you going.
On the other hand, velocity is a vector quantity. Because it is composed of a <u>magnitude and a direction</u>, for example 10m/s to the south is a velocity, and 10m/s is a speed.
AN OBJECT FLOAT BECAUSE OF ITS LOW CAPACITY AND SINKS BECAUSE OF ITS HIGH CAPACITY
Answer:
Explanation:
Given
mass of projectile 
initial horizontal speed 
height 
Considering vertical motion
velocity gained by projectile during 26.7 m motion

v=final velocity
u=initial velocity
a=acceleration
s=displacement



Horizontal velocity will remain same as there is no acceleration
final velocity 

Initial kinetic Energy 

Final Kinetic Energy 


Work done by all the force is equal to change in kinetic Energy of object
Work done by gravity is 

Answer:
THEY HAVE THE SAME VOLTAGE