Answer:
a.) F = 3515 N
b.) F = 140600 N
Explanation: given that the
Mass M = 74kg
Initial velocity U = 7.6 m/s
Time t = 0.16 s
Force F = change in momentum ÷ time
F = (74×7.6)/0.16
F = 3515 N
b.) If Logan had hit the concrete wall moving at the same speed, his momentum would have been reduced to zero in 0.0080 seconds
Change in momentum = 74×7.6 + 74×7.6
Change in momentum = 562.4 + 562.4 = 1124.8 kgm/s
F = 1124.8/0.0080 = 140600 N
Answer:
9 kW-hr
Explanation:
3000 W = 3 kW for 1 hr = <u>3 kW - hr </u>
2000 W = 2 kW for 3 hr = <u> 6 kW -hr</u>
<u />
total power = <u> 3 + 6 = 9 kW-hr</u>
Answer:
A satellite orbiting earth 1
Your shoulder 3
f=m x a 2
A soccer ball 2
A magician 3
When you paddle 3
A picture 1
Earth 1
A rocket 1
A speed skater 2
Explanation:
Law 1 states an object at rest , stay at rest and an object in motion stays in motion unless acted on by another force.
Law 2 states that the acceleration of an object depends on its mass and force applied.
Law 3 states every action creates an equal and opposite reaction.
