Part 4 10) A 1-kg ball is released from a height of 6 m, and a 2-kg ball is rele

Question

Part 4 10) A 1-kg ball is released from a height of 6 m, and a 2-kg ball is released from a height of 3 m. Air resistance is negligible as they fall. Which of the following statements about these balls are correct? (There could be more than one correct choice.) Select 2)(2pts Both balls will reach the ground with the same speed. Both balls will reach the ground with the same kinetic energy. As they reach the ground, the 1-kg ball will be moving faster than the 2-kg ball Both balls will take the same time to reach the ground. As they reach the ground, the 1-kg ball will have more kinetic energy than the 2-kg ball because it was dropped from a greater height.

Explanation / Answer

An object falling vertically is subjected to an acceleration g = 9.81 m/s2.

So the speed is gt. t will be higher for ball 1 since it is dropped from a greater height, so its speed will be more than that of the 2nd ball.

So, option 1 is false.

Since speeds are different, the KE will also be different. So, 2nd option is also false.

As discussed above, ball 1 will be travelling faster than the 2nd ball on reaching thje ground. So, 3rd option is true.

Since they are dropped from different heights, they take different time to reach the ground. So the 4th option is false.

Since ball1 will be having more velocity, its KE will also be higher. SO, 5th option is true.

Hence the correct options are:

3 and 5.

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---