Explanation:
y = ½ at²
Multiply both sides by 2:
2y = at²
Divide both sides by a:
t² = 2y/a
Take the square root of both sides:
t = √(2y/a)
Answer:
K.E=1/2 mv²
m=1160 kg
v=19.0 m/s
so k.e=1/2*1160*(19.0)²
K.E=1/2*1160*361
K.E=1/2*418760
K.E=209380=2.0*10^5 j
27.6 m/s
hopefully it makes sense and is visible
:)
1.55 N
Density = mass / volume
0.789 g/mL = m / 200.0 mL
m = 157.8 g
Weight = mass × acceleration due to gravity
W = (0.1578 kg) (9.8 m/s²)
W = 1.55 N
