Physics
Grade-7
Easy
Question
Direction : Calculate the missing term.
m = 25 Kg
v = 10 m/s
K.E. = ?
- 5000 J
- 1250 J
- 2500 J
- 125 J
Hint:
1250 J
The correct answer is: 1250 J
KE =
mv2
![equals space 1 half space cross times space 25 space cross times space 10 squared
equals space 1 half space cross times space 25 space cross times space 100](data:image/png;base64,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)
= 1250 J
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v = ?
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![KE space equals space 2 mv squared](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFUAAAARCAYAAACsPOAgAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAQ3ZOC+gAAAclJREFUeNrtl7FLw0AYxQ8RCVIEB5EiIpQi4ioO0kEEEfE/KCJuHRwcRHB2EJzFpTi5SoYOpbiJSJGCSOneURzcHERE0HfwAuG4I0lzSW/Ig0fJJW3vfn33fVchCo2qP/oH7sLVAok9TcBH8GuBwr6+CwR2tQk/mmqEqjX4Dp7U1BKd81IN9uFP1rQ+vD8moGXW1EocqEvwrQJU5AzPJJmKOlzi9SoXVs95Hstwm2BFFNQ5+BqeiploFyRDMMg5oR14JuqIIDUNXxiAugxV1yyCue7BL7zvhxK+Bfc43mXyBDv5iqbk9EPXHc0zRlinsBfjuTRnuyzq8gbBqN/XgB9YIqQO4SuCDo8fEHzA4Fz5LPmes4i1aBfcDP1aScGMUx4TV9PM1edZUk10UzP+y9cFeKjcezc1oyhYu/ywckZJzUKzcAveMczVSzgeSKZ4PXRk6o26NQXBDtisXN/+FQKtJpxrnPEGt7xgqk/SQA3APjMFriZVNokbNlaRAVS59jeWiA94MS1UqW1ugZKDUOc1f0psQxXcBZfwU5qtKTRg75X64wLUdpzjjAWodTa1Y5tQg7NcK5QKF/6mxp1DWqhyzV8RjbtQHvoHj1OeUSmVMe8AAACedEVYdE1hdGhNTAA8bWF0aCB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMTk5OC9NYXRoL01hdGhNTCI+PG1pPktFPC9taT48bW8+JiN4QTA7PC9tbz48bW8+PTwvbW8+PG1vPiYjeEEwOzwvbW8+PG1uPjI8L21uPjxtc3VwPjxtaT5tdjwvbWk+PG1uPjI8L21uPjwvbXN1cD48L21hdGg+j4uWDwAAAABJRU5ErkJggg==)
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![KE space equals space 2 mv squared](data:image/png;base64,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)
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