Answer:
C) 100N
Explanation:
Formula for calculating the Weight of an object is expressed as;
Weight = mass × acceleration due to gravity
Given
Mass of the object = 10kg
Acceleration due to gravity = 9.81m/s²
Substitute into the formula above
Weight = 10×9.81
Weight = 98.1N
Hence the approximate weight of the object is 100N
Answer:
Velocity (v) can be calculated via v = gt, where g represents the acceleration due to gravity and t represents time in free fall. Furthermore, the distance traveled by a falling object (d) is calculated via d = 0.5gt^2.
Data:
mass, m = 30.94 g
density, d = 19.32 g/cm^3
Formula: d = m / v => v = m / d = 30.94 g / 19.32 g/cm^3 = 1.60 cm^3
Then, the answer is the option C.
0.030 hours
First part of run
d = 1.5 km
s = 85 km/h
t = d / s = 1.5/85
t1 = 0.017647 hours
Second part of run
d = 0.80 km
s = 67 km/h
t = d / s = 0.80/67
t2 = 0.011940 hours
t1 + t2 = 0.017647 + 0.011940
= 0.030 â„Žours
