Answer:
पत्र- अपने क्षेत्र की सड़कों की बुरी दशा की जानकारी देते हुए और उन्हें ठीक कराने की प्रार्थना करते हुए नगर निगम अधिकारी को पत्र लिखिए |
Distance is a scalar quantity, as it has only one part.
Answer:
Explanation:
Let Vc be the velocity of the car and Vm the velocity of the motorcycle. If we convert their given values, we get:
Vc = 87 km/h * 1000m / 1km * 1h / 3600s = 24.17m/s
Vm = 95 km/h * 1000m / 1km * 1h / 3600s = 26.38m/s
Since their positions are equal after 17s we can stablish that:
Where d is the initial separation distance of 54m. Solving for a, we get:
Repacing the values:
Force=tension-fg sin ∅
=140-mg sin 18.5
=140-124.35
=15.62N
a=f/m=15.62/40=0.39
now,
v²=u²+2as
=2×0.39×80
v²=62.4
v=7.8m/s
Answer:
0.0247212 Joules
-0.0247212 Joules
Explanation:
Potential energy
a) The work done by the gravitational force is given by the potential energy that the body has at the start of the fall.
Work done is considered as positive if the force which is being applied is in the direction of motion.
Hence, the work done on the raindrop by the gravitational force is 0.0247212 Joules
b) As the drop is falling the air resistance provides an opposite force this means the sign of the work done will be negative.
So, the work done on the raindrop by air resistance is -0.0247212 Joules