Need help with M1 question

joestevens2092

4) A block of mass 20kg is released from rest at the top of a rough slope. The slope is inclined at 30(degrees) to the horizontal. After 6s the speed of the block is 21ms. As the block slides down the slope it is subjected to a constant resistance of magnitude RN. Find the value of R.

Just lost on how to begin really, any help would be great, thanks!

Reply 1

miml

17

Have you drawn a diagram?

OP

Yes I have,

Well we know

a = \frac{v-u}{t}

Does that help...

Reply 4

ghostwalker

17

joestevens2092

4) A block of mass 20kg is released from rest at the top of a rough slope. The slope is inclined at 30(degrees) to the horizontal. After 6s the speed of the block is 21ms. As the block slides down the slope it is subjected to a constant resistance of magnitude RN. Find the value of R.

Just lost on how to begin really, any help would be great, thanks!