Explanation:
Elastic collision is said to occur if the total kinetic energy is not conserved and if there is a rebound after collision
Step one
Analysis of the problem
Immediately after impact the car's velocity was zero making it a perfect elastic collision
Step two
Given
Mass of car M1=1800kg
Mass of truck M2=5200kg
Initial velocity of Car U1=44m/s
Initial velocity of truck U2=21m/s
Final velocity of car V1= 0m/s
Final velocity of truck V2=20m/s
Step three
According to the principle of conservation of momentum
Total momentum before collision
=M1U1+M2U2
Total momentum after impact
=M1V1+M2V2
M1U1+M2U2 =M1V1+M2V2
Substituting our data into the expression we have 1500*44+5800*21=1500*0+5800*20
=66000+1218000=11600
1284000=11600
From the solution the momentum before impact is 1284000Ns
Momentum after impact is 11600Ns
This is indicating that after impact there was loss in momentum as a result of the car having a velocity of zero
Answer&Explanation:
Since dimensional formula is the way of expressing physical quantity in terms of it's dimension;
Mass per unit area will be,,
Mass=M
Area=L×L=L²
Therefore dimensional formula is=ML^-2 and not M/L²
Society shapes us through our gender, it dictates what jobs would be suitable for us, what we should wear, how we should look, who we are to socialise with and what is acceptable or not.
Answer: stretch when your muscles are already warm
don't rush through a stretching routine.
slowly ease into position and hold stretch smoothly in order to adequately release tension
breath normally through stretch
stretch each major muscle group together in full range of motion
Explanation: warmth provides stretch with east, cold stretching causes more strain and possible injury
oxygen is delivered to the muscles during proper breathing technique
