Question

Date:
5. A ball is dropped off a very tall canyon ledge. Gravity accelerates the bar
at 9.8 mis. How fast is the ball traveling after 5 seconds?​

Answer 1

Given :

• Initial velocity of ball, u = 0   [since, ball is dropped from a very high canyon ledge]
• Acceleration due to gravity, a = 9.8 m/s²

To find :

• velocity of ball after time (t) of 5 second of being dropped, v = ?

Formula required :

• First equation of motion

    v = u + a t

[ Where v is final velocity, u is initial velocity, a is acceleration, t is time taken ]

Solution :

Using the first equation of motion

→ v = u + a t

→ v = ( 0 ) + ( 9.8 ) ( 5 )

→ v = 9.8 × 5

→ v = 49    m/s  

Therefore,

• Final velocity of ball after 5 seconds will be 49 m/s.

Three equations of motion :

• First equation of motion

      v = u + a t

• Second equation of motion

     s = u t + 1/2 a t²

• Third equation of motion

     2 a s = v² - u²

[ Where v is final velocity, u is initial velocity, a is acceleration, t is time taken, s is distance covered ]

Answer 2

Answer:

✡ Correct Question ✡

➡ A ball is dropped off a very tall canyon ledge. Gravity accelerates the barat 9.8 m/s². How fast is the ball traveling after 5 seconds?

✡ Given ✡

➡ A ball is dropped off a very tall canyon ledge. Gravity accelerates the barat 9.8 m/s².

✡ To Find ✡

➡ The ball traveling after 5 second ?

✡ Formula Used ✡

➡ Newton's 1st Equation Motion :-

$\bold{\huge{\fbox{\color{blue} {v = u + at}}}}$

✡ Solution ✡

➡ By using 1st equation of motion:-

✴ v = u + at ✴

According to the question:-

=> v = (0) + (9.8) + (5)

=> v = 9.8 × 5

=> v = 49 m/s

∴ Final velocity of ball after 5 second is 49 m/s.

_____________________

✡ Additional Information ✡

▶ Newton's 1st law of motion:-

✏ The first law defines the force qualitatively.

✴ v = u + at ✴

▶ Newton's 2nd law of motion:-

✏ The second law offers a quantitative measure of the force.

✴ s = ut + $\dfrac{1}{2}$ at²

▶ Newton's 3rd law of motion:-

✏ The third asserts that a single isolated force doesn't exist.

✴ 2as = v² - u² ✴

Explanation:

HOPE IT HELP YOU