the science paper of 2017 solve it.
Attachments:
Answers
Answered by
1
1. Buoyancy refers to the upwards thrusting force a fluid exerts on an object immersed.
2. a) m/sec
b)
3. Newton's Third Law of Motion states that for every action force, there exists an equal and opposite reaction force and these act on two different bodies, and never cancel each other.
4. This happens because when the sheet isn't crumpled, it has a larger surface area exposed when falling, which causes a higher amount of friction with the air (aerodynamic drag)
5. The SI unit of G is
It's called the Universal Gravitational Constant since its value doesn't change in any gravitation-related calculation in the entire universe.
6. m = 70g
u = 0.5 m/sec
v = 0 m/sec
t = 0.5sec
a = (v-u)/t
= -0.5/0.5 m/sec^2
= -1 m/sec^2
F = ma = 0.5m/sec * -1m/sec = -0.5N was the net force on the ball
Therefore, force applied by the player was 0.5N
8. Power is the rate of change of energy, or the rate of change in work done.
Kilowatt is a unit of Power whereas Kilowatt-Hour is a unit of work and energy
9. Relative Density of a substance is its density relative to water. If the relative density of an object is 8 units, it will sink in water as the upthrust it will feel will be less than its own weight, causing the weight to unbalance the buoyant force, making the object sink. The weight of water it will displace will be less than its own weight.
2. a) m/sec
b)
3. Newton's Third Law of Motion states that for every action force, there exists an equal and opposite reaction force and these act on two different bodies, and never cancel each other.
4. This happens because when the sheet isn't crumpled, it has a larger surface area exposed when falling, which causes a higher amount of friction with the air (aerodynamic drag)
5. The SI unit of G is
It's called the Universal Gravitational Constant since its value doesn't change in any gravitation-related calculation in the entire universe.
6. m = 70g
u = 0.5 m/sec
v = 0 m/sec
t = 0.5sec
a = (v-u)/t
= -0.5/0.5 m/sec^2
= -1 m/sec^2
F = ma = 0.5m/sec * -1m/sec = -0.5N was the net force on the ball
Therefore, force applied by the player was 0.5N
8. Power is the rate of change of energy, or the rate of change in work done.
Kilowatt is a unit of Power whereas Kilowatt-Hour is a unit of work and energy
9. Relative Density of a substance is its density relative to water. If the relative density of an object is 8 units, it will sink in water as the upthrust it will feel will be less than its own weight, causing the weight to unbalance the buoyant force, making the object sink. The weight of water it will displace will be less than its own weight.
Similar questions