A)
Upward force = Normal Force
Downward force = weight
Resultant force = ma
Resultant = Weight - Normal
1.2 x 5 = 1.2 x 9.81 - Fn
Fn = 5.77 N
B)
The reactant force is equal to the force exerted by the dog, just in the opposite direction. Thus, the dog's force is also 5.77 N.
Answer:
B. 4.29s
Explanation:
If the man appears to move 12.4m/s when the boat appears to move 11m/s, it means that the man moves 1.4m on the boat (12.4-11=1.4). So if the man moves 1.4m per second then it will take him 6/1.4=4.29s to move 6 m relative to the boat.
Hope this helped!
KE = 1/2mv^2
m=10 v=3
KE=1/2*10*3^2
KE= 45 Joules
C. More sunlight reaches the environment.