1. Give your examples of scalars and vectors. 2. Solve the problem involving uni

Question

1. Give your examples of scalars and vectors.
2. Solve the problem involving uniform motion:
One car starts from point A and moving to point B.
Another car starts at the same time from point B
and moves to point A along the same highway.
Assign your numbers for the speed of each car
and distance between A and B.
Make an equation with x as a time of movement.
How long it will take for cars to meet (find x)

Q 3 Assign your numbers for mass and speed of the object and calculate the value of kinetic energy.
How kinetic energy will change if this object will increase the speed in two times?

Explanation / Answer

1 scalar:speed, distance

vector:velocity,displacement

2)let car A starts with " U"at A and car B starts with "V"at B,let distance between A and B be d units;since speeds are constant acceleration is zero for both cars

for A: s=u*time+0.5*accelration*time^2,imples s1=U*time

for B: s=u*time+0.5*accelration*time^2,implies: s2=V*time

distance between car A and car B from A is D-(U-V)*time

time taken to meet is:D/(U-V)

3) let mass be "M" and speed be "V "

kinetic energy is given by:0.5*M*V^2

if speed is increased by 2 times the speed is 2V

then kinetic energy is:0.5*M*V^2*4=2*M*V^2

kinetic energy is 4 times more then intial

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