Question 1:
d = distance the bowling ball has fallen = ?
g = acceleration due to gravity acting on the ball by earth = 9.8 m/s²
t = time of fall for the ball = 3.0 s
distance the ball has fallen is given as
d = (0.5) g t²
inserting the above values in the equation above
d = (0.5) (9.8 m/s²) (3.0 s)²
d = (0.5) (9.8 m/s²) (9.0 s²)
d = (4.9 m/s²) (9.0 s²)
d = 44.1 m
Question 2 :
m = mass of the lunch box pushed = 3 kg
a = acceleration of the lunch box = 2 m/s²
F = net force acting on the lunch box
as per newton's second law , net force is given as
F = ma
F = 3 x 2
F = 6 N
Question 3 :
m = mass of rock = 10 kg
g = acceleration due to gravity = 9.8 m/s²
W = weight of the rock
weight of rock is given as
W = mg
W = 10 x 9.8
W = 98 N
