This is a tricky one but on my part I'd have to say depending on the contract A,B,C.
Answer:
Final speed of the racer, v = 16.55m/s
Explanation:
It is given that,
Initial velocity of the racer, u = 12 m/s
Acceleration,
time taken, t = 7 s
We need to find the final velocity of the racer. Let it is given by v. It can be calculated using first equation of motion as :
v = 16.55 m/s
So, the final speed of the racer is 16.55 m/s. Hence, this is the required solution.
<span>Heat pumps use a compressor to make the working fluid condense at a higher:D</span>
as per the question charlie runs to the store which is 4 km away
hence the total distance covered [S] is 4 km
he takes 30 minutes to reach the store.
hence the total time taken [t] = 30 minutes=0.5 hour
We have to calculate the average speed.
the average speed[v]=
=
=8 km/hour
then we have to calculate the total distance traveled by charlie in 1 hour.
the distance covered S=
=8 km/hour ×1 hour
=8 km
Hence the average speed of charlie is 8 km/hour and he covers a distance of 8 km in 1 hour.
Answer:
Explanation:
Let the initial velocity of small block be v .
by applying conservation of momentum we can find velocity of common mass
25 v = 75 V , V is velocity of common mass after collision.
V = v / 3
For reaching the height we shall apply conservation of mechanical energy
1/2 m v² = mgh
1/2 x 75 x V² = 75 x g x 10
V² = 2g x 10
v² / 9 = 2 x 9.8 x 10
v² = 9 x 2 x 9.8 x 10
v = 42 m /s
small block must have velocity of 42 m /s .
Impulse by small block on large block
= change in momentum of large block
= 75 x V
= 75 x 42 / 3
= 1050 Ns.