Sand
dead creatures
polluted coral reefs will die
REMEMBER...CORAL ARE LIVING
Answer:
Velocity of car = 75 m/s
Explanation:
Given:
Mass = 1,600 kg
Momentum = 120,000kgm/s
Find:
Velocity of car
Computation:
Velocity = Momentum / mass
Velocity of car = 120,000 / 1,600
Velocity of car = 75 m/s
Answer:
220.7
Explanation:
distance traveled is 1.5*5=7.5m
PE gain is MGH=3*9.81*7.5=220.7
Answer:
F1 = -2810.87N
F2 = 2810.87N
Their bones are safe.
Explanation:
Change in momentum = impulse
∆p = F∆t
F= ∆p/∆t
Given;
m1 = m2 = 75.2kg
v1i= 7.7m/s
v2i= 0m/s
v1f=v2f = 3.85m/s
∆t = 0.103s
Where;
m1 and m2 are mass of the skaters
v1i and v2i are the initial velocity of the skaters
v1f and v2f are the final velocity of the skaters
F1 and F2 are the forces experienced by skater 1 and skater 2
For skater 1
F1 = ∆p1/∆t
F1 = m1(v1f - v1i)/∆t
F1 = 75.2kg (3.85-7.7)/0.103
F1 = -2810.87N
For skater 2
F2 = ∆p2/∆t
F2 = m2(v2f - v2i)/∆t
F2 = 75.2kg (3.85-0)/0.103
F2 = 2810.87N
Therefore, their bone is safe since their average force is less than 4824N