Answer:
a) a = 0
b) W = 29.72 N
Explanation:
a)The acceleration of an object is defined as the change of its speed with respect to a time interval, Because the briefcase remains at rest, its acceleration (a) is zero.
a=0
b) Calculation of the weight of the briefcase
The formula to calculate the weight is the following:
W= m*g Formula (1)
Where:
W : is the weight in Newtons (N)
m : is the mass in kilograms (kg)
g : is the acceleration due to gravity in meters over second square (m/s²)
Data
m=3.03 kg : mass of the briefcase
m=9.81 m/s² : acceleration due to gravity
We replace data in the formula (1)
W= m*g = 3.03 kg * 9.81 m/s²
W= 29.72 N
Answer: True.
Explanation:
Drugs and psychoactive substances are chemical substances of the extremely physiological effect that alter brain function and temporarily alter perception, mood, and feelings. Drugs are illegal in most countries of the world because they have a terrible impact on the organism and human health. The most severe addiction is created by heroin and cocaine, which are dangerous narcotics. Narcotics produce physical and psychological dependence.
The answer is letter B.
The solution is as follows:
97.2 ft/ x = 64.8 ft
97.2 / 64.8 = x
x = 1.5
Divide 97.2 by x 4 times and we have the following data:
1st fall = 97.2 ft
2nd fall = 64.8 ft
3rd fall = 43.2 ft
4th fall = 28.8 ft
5th fall = 19.2 ft
Total distance of falls = 253.2 ft
Answer: B. V/b
Explanation: