Question

05. 1) What do you mean by free fall?
ii)A car falls off a ledge and drops to the ground in 0.8 s. (g = 10m s?).W
EnaAran forhina tha And Habisht​

Answer 1

Explanation:

ItsSamGupta

• ANSWER
• Given,
• time taken=0.5s
• g=10ms
• −2
• As the car is under free fall, the initial speed is zero.
• (a) Under free fall,
• u=0
• a=g
• v=u+at
• v=0+10×0.5
• v=5ms
• −1
• (b) Average speed =
• 2
• u+v
• =
• 2
• 0+5
• =2.5ms
• −1
• (c) From newton's equation of motion, As u=0,
• h=ut+
• 2
• 1
• gt
• 2
• When h is the height, t is the time of free fall, g is the acceleration due to gravity. Putting the values in the above equation, we get
• h=
• 2
• 1
• ×10×(0.5)
• 2
• =5×0.25=1.25m

Answer 2

Answer:

In Newtonian physics, free fall is defined as the motion of an object where gravity is the only force acting upon it. ... A skydiver may be pulled towards earth by gravity, but they are also affected by air resistance, a force opposing their downward movement.