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mars1129 [50]
3 years ago
13

If an object is thrown straight up from the ground what velocity does it need to be thrown in order to reach a height of 50 ft?

Mathematics
2 answers:
Pavlova-9 [17]3 years ago
8 0

Answer:

Object is thrown with a velocity of 56.74 m/sec

Step-by-step explanation:

We have given height h = 50 feet

When the object reach at its maximum height its final velocity will be o

So final velocity v = 0 m/sec

Acceleration due to gravity g=-32.2feet/sec^2 ( Negative sign is due to upward direction )

From third equation of motion

v^2=u^2+2gh

0^2=u^2-2\times 32.2\times 50

u^2=3220

u=56.74m/sec

So object is thrown with a velocity of 56.74 m/sec

ra1l [238]3 years ago
5 0

Answer:

40 ft/sec

Step-by-step explanation:

height h = 50 ft

final velocity v would be zero.

acceleration a = -32 ft/sec^2

we kn that

u^2=v^2+2ah

u^2= 0^2- 32×50

u= √(32×50)

u= 40 ft/sec

the object must be thrown with the velocity of 40 ft/sec

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Match each expression to another expression with the same value. 24 ÷ 3 53 × 7 56 − 21 4 − 3 40 × 2 8 × 50 8 × (5 × 12 − 10) (8
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Answer:

a. 24 ÷ 3  = 8                       ⇒              i. 8 × 3 ÷ (6 − 3)  = 8

b. 53 × 7 = 371                     ⇒             h. (8 × 7 − 3) × 7 = 371

g. 8 × (5 × 12 − 10) = 400    ⇒             f. 8 × 50 = 400

Step-by-step explanation:

Given:

We have to match the equivalent expressions:

a. 24 ÷ 3                 f. 8 × 50

b. 53 × 7                 g. 8 × (5 × 12 − 10)

c. 56 − 21               h. (8 × 7 − 3) × 7

d. 4 − 3                   i. 8 × 3 ÷ (6 − 3)

                e. 40 × 2          

             

Solution:

a. 24 ÷ 3 = 8                

b. 53 × 7 = 371            

c. 56 − 21 = 35            

d. 4 − 3 = 1  

e. 40 × 2 =80                            

f. 8 × 50 = 400                      

g. 8 × (5 × 12 − 10)  <em>Using PEMDAS rule.</em>

⇒ 8\times (60-10)

⇒ 8\times 50

⇒ 400

h. (8 × 7 − 3) × 7

⇒ (56-3)\times 7

⇒ (53)\times 7

⇒ 371

i. 8 × 3 ÷ (6 − 3) = 8

⇒ \frac{8\times 3}{3}

⇒ \frac{24}{3}

⇒ 8

Answers:

a. 24 ÷ 3  = 8                       ⇒              i. 8 × 3 ÷ (6 − 3)  = 8

b. 53 × 7 = 371                     ⇒             h. (8 × 7 − 3) × 7 = 371

g. 8 × (5 × 12 − 10) = 400    ⇒             f. 8 × 50 = 400

c,d and e didn't have any match    

a is equivalent to i,b equivalent to h and g is equivalent to f.

6 0
3 years ago
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