Hello
I hope you are absolutely fine. As per your mentioned query, speed is a scalar quantity which tells you how the object is moving fast. Whereas velocity is a vector quantity which tells you about the speed as well as direction.
I hope this helps you!
Revert for further query!
Hello Adarsh,
Speed is an example of a scalar quantity that indicates how fast an object is moving, without regard to direction. Speed only measures (i.e. magnitude) (e.g. 60 km/h).
Velocity is an example of a vector quantity that indicates how fast an object is moving, and direction - i.e. (e.g. 60 km/h north).
So speed tells you how fast, while velocity tells you how fast and, in what direction.
Difference between Speed and Velocity:
Speed is the rate at which an object moves, without considering direction. Velocity is the rate of motion in a specific direction.
Speed is a scalar quantity. Velocity is a vector quantity.
Question : If a body moves with a constant speed in a circle:
Option 1: no work is done on it
Option 2: no force acts on it
Option 3: no acceleration is produced
Option 4: its velocity remains constant
Question : In 1851, who founded the science of hydrodynamics with his law of viscosity describing the velocity of a small sphere through a viscous fluid?
Option 1: Daniel Bernoulli
Option 2: George Gabriel Stokes
Option 3: Evangelista Torricelli
Option 4: Heinrich Gustav Magnus
Question : Comprehension:
Read the following passage and answer the questions given after it.
The Indian Space Research Organisation (ISRO) announced another successful mission. ISRO chairman S. Somanath said that three small satellites successfully separated and were injected into orbit. ISRO launched three small satellites powered by its SSLV-D2 launch vehicle from Satish Dhawan Space Centre at Sriharikota on February 10, 2023, at 09:18 AM IST. The launch vehicle was carrying EOS-07, Janus-1 & AzaadiSAT-2 satellites and aimed to inject them into a 450 km circular orbit. The launch took place at the first launch pad at SDSC SHAR, Sriharikota. The SSLV-D2 had to take a 15-minute flight to inject EOS-07, Janus-1, and AzaadiSAT-2 satellites into a 450 km circular lower orbit. “It is configured with three solid propulsion stages and a velocity terminal module. It is a 34 m tall, 2 m diameter vehicle having a lift-off mass of 120 t,” said ISRO. The EOS-07 satellite weighs 156.3 kg and is made by ISRO.
About 13 minutes into its flight, the SSLV rocket ejected EOS-07 and soon after that the other two satellites Janus-1 and AzaadiSAT-2 were ejected — all at an altitude of 450 km, said ISRO.
With the new rocket in its portfolio, ISRO will have three rockets — Polar Satellite Launch Vehicle (PSLV) and its variants (cost about Rs 200 crore), Geosynchronous Satellite Launch Vehicle (GSLV-MkII cost about Rs 272 crore and LVM3 Rs 434 crore) and SSLV (Development cost of three rockets about Rs 56 crore each) and production cost may go down later.
“New experiments include mm-Wave Humidity Sounder and Spectrum Monitoring Payload. Janus-1, a 10.2 kg satellite belongs to ANTARIS, USA. An 8.7 kg satellite AzaadiSAT-2 is a combined effort of about 750 girl students across India guided by Space Kidz India, Chennai,” it added.
SSLV caters to the launch of up to 500 kg satellites to Low Earth Orbits on a ‘launch-on-demand’ basis. “It provides low-cost access to Space, offers low turn-around time and flexibility in accommodating multiple satellites, and demands minimal launch infrastructure,” as per a statement by ISRO.
Question:
Which satellite was injected into the orbit first?
Option 1: EOS-07
Option 2: Janus 1
Option 3: AzaadiSAT-2
Option 4: Antaris
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