The same braking force does work on these objects to slow them down. The work done is equal to their change in kinetic energy:
FΔx = 0.5mv²
F = force, Δx = distance traveled, m = mass, v = speed
Isolate Δx:
Δx = 0.5mv²/F
Calculate Δx for each object.
Object 1: m = 4.0kg, v = 2.0m/s
Δx = 0.5(4.0)(2.0)²/F = 8/F
Object 2: m = 1.0kg, v = 4.0m/s
Δx = 0.5(1.0)(4.0)²/F = 8/F
The two objects travel the same distance before stopping.
All sources of energy on the planet (excluding nuclear reactions) are ultimately attributable to the sun. 'Fossil fuels' are derived from what once were living organisms, and all sources of food begin with primary producers (plants and algae which utilize photosynthesis).
Answer:38.675 m/s
Explanation:
t=4.2 s
Solving in x direction
ucos25=25
u=27.584 m/s
Initial velocity in vertical direction usin25
Let h be the height of Rooftop
h=37.47 m
Therefore final vertical velocity is 
=29.51 m/s
Final Resultant velocity
Answer:
V= 2.7 [v]
Explanation:
The value of the resistance is given by:
so:
We can calulate the voltage dropped using the Ohm's law:
Answer:
B) -1m/s^2
Explanation:
Final speed = 0 m/s
Initial speed = 5m/s
Time taken for it to come to rest(0m/s) = 5
then use the formula;
[v = u + at],where v is the final speed..u is the initial speed..t is time taken for it to come to rest and a is the acceleration
; 0 = 5 + 5a
; -5 = 5a
;Acceleration = -1 m/s^2
