Answer:
Explanation:
t=Time airborne=2.54 s
R= horizontal range= 25.5 m
From the projectile motion equations we know that:
H=7.9 m
The heart rate will likely decrease. As the cardiac muscle, or heart, gets stronger, it takes less effort to pump more blood. As a result, the heart will probably beat less, decreasing the heart rate. This is why athletes often have lower heart rates than the average person.
Friction, lack/loss of kinetic energy
Answer:C
Explanation:
let the speed be v for both mass x and mass y
mass(x)=500kg
mass(y)=2000kg
Kinetic energy(mass(x))=(500 x v^2)/2
Kinetic energy(mass(x))=250v^2
Kinetic energy(mass(y))=(2000xv^2)/2
Kinetic energy(mass(y))=1000v^2
Ratio of kinetic energy y to x =1000v^2:250v^2
=1000v^2 / 250v^2
=4/1=4:1
