Answer:
a = 3.61[m/s^2]
Explanation:
To find this acceleration we must remember newton's second law which tells us that the total sum of forces is equal to the product of mass by acceleration.
In this case we have:
Explanation:
the answer is b I think.......
Answer:
horse power of the truck 39,000 kgm²s⁻³
Explanation:
Calculate horse power of the truck.
Work = force x distance
where, force = mg = 2000 kg x 9.8 m/s² = 19,600 kgm/s²
distance = 10 meter
Work = 19,600 kgm/s² x 10 meter
= 196,000 kgm²s⁻²
Power = work / time
= 196,000 kgm²s⁻² / 5 seconds
= 39,000 kgm²s⁻³
Answer:
a) 6076 m
b) 43.33 m/s
c) 68 m/s
Explanation:
(a) If the airplane rounds half the circle in 156s, its displacement is the circle diameter in 156s, or twice the circle's radius
s = 2r = 2* 3.38km = 6.76 km or 6760 m
(b) The average velocity would be displacement over unit of time
v = s/t = 6760 / 156 = 43.33 m/s
(c) The length of the chord it's swept in 156s is half of the circle perimeter
c = πr = π3.38 = 10.62 km or 10620 m
The airplane average speed is its chord length over a unit of time
c / t = c / 156 = 68 m/s
When you start sliding the couch, you have to overcome the static friction of the carpeted floor, which is usually very big, especially due to the texture of the carpet. However, as long as you get it moving, you only have to apply the force to overcome the kinetic friction, which is smaller than the static friction.