Answer:
x = ~0.1289 m/s^2
Explanation:
We can use one of the kinematic formulas. We see that the equation doesn’t contain the final velocity, so we use the kinematic equation d = v_0t + (1/2)at^2.
Since the train started from rest, the initial velocity, v_0, is 0. Thus, the equation becomes:
d = (1/2)at^2
Note that 5 minutes is 300 seconds and 5.8 km is 5800 m. Substituting the values we are given, we get:
5800 m = (1/2)(x m/s^2)(300 s)^2 = (45000 s^2)(x m/s^2)
Dividing by 45,000 on both sides, we get:
x = ~0.1289 m/s^2
I hope this helps! :)
You don't say what the insulators are insulating from ... heat or electricity.
Here are some of each:
Heat insulators:
-- Air (between the inner and outer bottles of a thermos bottle)
-- Wood (around the handle of a frying pan)
-- Cloth (an oven mitt)
Electrical insulators:
-- rubber
-- plastic
-- wood
-- cloth
-- air
Answer:
N 204.13
Explanation:
Using equation of motion
v² = u² + 2as
u = 0 is the egg was dropped from rest.
v = 2 × 9.8 × 32 = √627.2 = 25.04 m/s
when the egg hit the foam-rubber, the acceleration can be calculated with
a = change in velocity / change in time = - 25.04 / 0.0092 = -2721.74 m/s²
a) how much it is compressed
v² = u² + 2as
- u² = 2 (-2717.4) s
- 627.2 / -5443.48 = s
s = 0.1152 m = 11.52 cm
b) average force exerted on the egg = mΔv / Δt = 25.04 × 0.075 / 0.0092 = 204.13
Answer:
a) heavier on sun
b) 63.0 kN
Explanation:
The weight is directly related to gravity, so because the sun has a bigger gravity than earth the barbell will be heavier on the sun.
the force exerted by the gravity is defined as: