You can tell whether velocity is changing because velocity is the rate/speed of motion of something in a direction either it increase or decrease in the speed or a change in its direction that will causes its velocity to change.
Answer:
The magnetic force can be found by using the following equation:
Let’s first deal with the magnitude, then we will figure out the direction by using the right hand rule.
The direction of the L is equal to the direction of the current. So, the direction of the L is to the right. The required force is to be pointed upward.
By the right hand rule the magnetic field should be directed towards ‘into the plane’.
Explanation:
In the questions regarding the magnetic field, the cross product and the directions of the vectors are crucial. So, you should use right-hand rule efficiently.
Right-hand rule:
Point your four fingers (except the thumb) towards the same direction as A.
Point your palm towards the same direction as B.
Your thumb should show the direction of C.
Momentum is defined as the product of force and mass.
therefore it is
p=mv
that is product=mass×force
hope it helps:)
Let the salmon jump with speed v at an angle of 33.3 degree
So here we can find out the components of his velocity in x and y direction
now the horizontal displacement of the salmon is 3.15 m so he cover this horizontal distance with constant speed as there is no acceleration in x direction
here we can say
now in Y direction it is an accelerated motion as it is accelerated due to gravity
now we will plug in v*t = 3.76
now speed v is given by equation above
so here he must have to jump with minimum speed of 5.25 m/s