Question

8 8.4 10 7. Solve the following examples. a) An object moves 18 m in the first 3 s, 22 m in the next 3 s and 14 m in the last 3 s. What is its average speed? (Ans: 6 m/s) b) An object of mass 16 kg is moving with an acceleration of 3 m/s2 Calculate the applied force. If the same force is applied on an object of mass 24 kg, how much will be the acceleration? (Ans: 48 N, 2 m/s2)​

Answer 1

Answer:

A. The average speed of the object will be 6 m/s. = 6 m/s (Ans.) Thus, the average speed of the object will be 6 m/s.

B An object of mass 16 kg is moving with an acceleration of 3 m/s2 Calculate the applied force. If the same force is applied on an object of mass 24 kg, how much will be the acceleration? (Ans: 48 N, 2 m/s2)

Answer 2

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a) An object moves 18 m in the first 3 s, 22 m in the next 3 s and 14 m in the last 3 s. What is its average speed?

solution::-

We know that the,

Avg speed is equal to the total distance divided by the total time taken,

avg speed =

• ↪3+3+3/18+22+14
• ↪= 9/54
• ↪=6 m/s

b) An object of mass 16 kg is moving with an acceleration of 3 m/s2 Calculate the applied force. If the same force is applied on an object of mass 24 kg, how much will be the acceleration?

Solution::-

• ↪m=16kg,a=3m/s²
• ↪F=m×a
• ↪F=16×3=48N
• ↪Now , F = 48 N , m = 24 kg
• ↪F=m×a
• ↪48=24×a
• ↪a=2m/s²

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