To solve this problem we will apply Newton's second law for which weight is defined as the product between mass and acceleration of gravity. That is to say
Here,
m = mass
g = Gravitational acceleration
If we have that 0.22lb is equal to 1N, then the weight will be
Gravitational force is equal to , then
Therefore the mass of the car is 1320.5Kg
Answer:
Landed before it explodes
Explanation:
vf = vi + at,
0 = 145 - (9.8)t,
t = 14.79 s (Time to reach highest point)
14.79 x 2 = 29.59 s (Time to land on the ground)
It will have landed before it explodes because both the time to reach the highest point and the time to land on the ground are less than 32 seconds.
The answer is Light rays are reflected by mirrors
Explanation:
We will calculate the gravitational potential energy as follows.
=
= 1164000 J
or, = 1164 kJ (as 1 kJ = 1000 J)
Now, we will calculate the change in potential energy as follows.
=
=
= -873000 J
or, = -873 kJ
Thus, we can conclude that change in gravitational potential energy is -873 kJ.
The approach here is to decompose all directions into North and East and then do simple Cartesian addition of the obtained coordinates.
S1 = 399 E
S2 = 552 Km 58.5 deg west of north ;
= 552 cos (58.5) N - 552 sin (58.5) E
= 288.41 N - 470.65 E
S3 = 890 N
total S = (890 + 288.41) N + (399 - 470.65) E
S = 1178.41 N - 71.65 E
D =
D = 1180.58 Km
direction = atan(N/E) = -86.52 deg
means : 3.48 deg west of north