Because 'acceleration' does NOT mean 'speeding up'.
It means ANY change in motion ... speeding up, slowing down,
or changing DIRECTION.
When traveling a roundabout, or any curved path, the direction
is constantly changing even if the speed is constant, so there is
constant acceleration going on.
Answer:
Explanation:
Given:
Mass of the boat, m = 4040 kg
The driving force of engine, FB = 4660 N in west = + 4660 N
The force of wind, Fwi = 880 N in east = -880 N
The force of water, Fwa = 1400 N in east = -1400N
Total three forces are acting on the boat
Fnet= Fb+fwi+Fwa
Fnet= 4660 - 880 - 1400
Fnet= +2380N
Acceleration (a) = Force/mass
= 2380/4040
= 0.59m/s2
Answer:
2
Explanation:
İf system ideal ( no frictional force )
Fnet=m.a
20=10.a
a=2m/s2
Answer:
a) 3.78 m/s
b) 3.78 m/s
Explanation:
a )From the equations of kinematics we know that
Vf - Vi = at
since Initial speed Vi = 0
acceleration = 4.2 m/s2
so we have
Vf = a t
= (4.2) (0.9)
= 3.78 m/s
velocity at t = 0.9 s. m/s is 3.78 m/s
b) If the sprinter maintains constant velocity then acceleration becomes zero.
So velocity is 3.78 m/s
