Can anyone solve this please please please in copy right answer physics class 9
with solution I will Mark his or her as brainliest
Answers
All three questions are based on newton's second law of motion. As per this law, Force is measured as the product of mass and acceleration
Question - 2)
What would be the force required to produce an acceleration of 2m/s² in a body of mass 12kg? What would be the acceleration if the force were doubled?
Answer - 2)
- Mass = 12kg
- Acceleration = 2m/s²
➝ F₁ = m × a₁
➝ F₁ = 12 × 2
➝ F₁ = 24 N
In second case force is doubled.
- F₂ = 2F₁ = 48N
➝ F₂ = m × a₂
➝ 48 = 12 × a₂
➝ a₂ = 4 m/s²
________________________________
Question - 3)
A man pushes a box of mass 50kg with a force of 80N. What will be the acceleration of the box? What would be the acceleration if the mass were halved?
Answer - 3)
- Mass = 50kg
- Force = 80N
➝ F = m₁ × a₁
➝ 80 = 50 × a₁
➝ a₁ = 8/5
➝ a₁ = 1.6 m/s²
In second case acceleration is halved.
- m₂ = m₁/2 = 25kg
➝ F = m₂ × a₂
➝ 80 = 25 × a₂
➝ a₂ = 80/25
➝ a₂ = 3.2 m/s²
________________________________
Question - 4)
A certain force of exerted for 1.2s raises the speed of an object from 1.8m/s to 4.2m/s. Later the same force is applied for 2 second. How much does the speed change in 2s?
Answer - 4)
- t = 1.2 s
- u = 1.8 m/s
- v = 4.2 m/s
From the first equation of motion,
➝ v = u + at
➝ 4.2 = 1.8 + 1.2a
➝ 2.4 = 1.2a
➝ a = 2 m/s²
Now acceleration remains constant.
Change in velocity in next second 2 s is given by
➝ a = ∆v/t
➝ 2 = ∆v/2
➝ ∆v = 4 m/s
Answer:
All three questions are based on newton's second law of motion. As per this law, Force is measured as the product of mass and acceleration
Question - 2)
What would be the force required to produce an acceleration of 2m/s² in a body of mass 12kg? What would be the acceleration if the force were doubled?
Answer - 2)
Mass = 12kg
Acceleration = 2m/s²
➝ F₁ = m × a₁
➝ F₁ = 12 × 2
➝ F₁ = 24 N
In second case force is doubled.
F₂ = 2F₁ = 48N
➝ F₂ = m × a₂
➝ 48 = 12 × a₂
➝ a₂ = 4 m/s²
________________________________
Question - 3)
A man pushes a box of mass 50kg with a force of 80N. What will be the acceleration of the box? What would be the acceleration if the mass were halved?
Answer - 3)
Mass = 50kg
Force = 80N
➝ F = m₁ × a₁
➝ 80 = 50 × a₁
➝ a₁ = 8/5
➝ a₁ = 1.6 m/s²
In second case acceleration is halved.
m₂ = m₁/2 = 25kg
➝ F = m₂ × a₂
➝ 80 = 25 × a₂
➝ a₂ = 80/25
➝ a₂ = 3.2 m/s²
________________________________
Question - 4)
A certain force of exerted for 1.2s raises the speed of an object from 1.8m/s to 4.2m/s. Later the same force is applied for 2 second. How much does the speed change in 2s?
Answer - 4)
t = 1.2 s
u = 1.8 m/s
v = 4.2 m/s
From the first equation of motion,
➝ v = u + at
➝ 4.2 = 1.8 + 1.2a
➝ 2.4 = 1.2a
➝ a = 2 m/s²
Now acceleration remains constant.
Change in velocity in next second 2 s is given by
➝ a = ∆v/t
➝ 2 = ∆v/2
➝ ∆v = 4 m/s
Explanation:
UNNIE
IS THAT UR REAL DP?
U LOOK CUTE