Would that be easier for the ramp part to calculate the resulting/net force and then calculate work done on the ramp as a product of the net force over distance1 ?...thanks for ur videos!!
There's one I'd like to see. A block of mass of 4 kg being pulled up a frictionless ramp by a constant force of 6 N. The ramp is 5 m high and 75 m long. If the block has some initial velocity, let's just say 3 m/s, what is the speed at the top of the ramp? I've made-up all these numbers. This isn't a homework problem or anything.
When you substituted d1 for h/sintheta, you cancelled mgsintheta to mgh but I don't think that's correct because sin theta and h/ sin theta are not being multiplied. Sin is a ratio i.e, it's sin OF theta. Eng is not my first language but I hope you understood my doubt. Could you please answer if I'm missing something?
pls where do you get this questions from. I love them and I am studying for A level physics. pls recommend a good textbook with good questions like this
your teaching method is very good
Thank you so much Physics ninja I have a similar 7 marks question,now I know how to do it.
14:02 is it okay if i said
fd=∆k
Which means Mgd=1/2mv^2
Which means
gd =1/2v^2
Then substitute with the values i know
To get d
isn't that basically the work energy theorem
what if there is another ramp on the end
Would that be easier for the ramp part to calculate the resulting/net force and then calculate work done on the ramp as a product of the net force over distance1 ?...thanks for ur videos!!
There are many ways to solve this problem. You either find the work done by each force or you find the work done by the net force, they are the same.
@@PhysicsNinja thanks again for ur videos! Some old farts like myself use them as part of recupiration)) cheers!
How about repeating using conservation of mechanical energy?
I’m getting 14.147 m by using a different method that’s worked in the past (energy transformations). Weird.
Hey! Is it possible to solve this using a pure dynamics and kinematics approach? I tried it and got a similar answer.
Yes, find accelation using newton’s 2nd law, then use kinematic equations
There's one I'd like to see.
A block of mass of 4 kg being pulled up a frictionless ramp by a constant force of 6 N. The ramp is 5 m high and 75 m long. If the block has some initial velocity, let's just say 3 m/s, what is the speed at the top of the ramp? I've made-up all these numbers. This isn't a homework problem or anything.
When you substituted d1 for h/sintheta, you cancelled mgsintheta to mgh but I don't think that's correct because sin theta and h/ sin theta are not being multiplied. Sin is a ratio i.e, it's sin OF theta. Eng is not my first language but I hope you understood my doubt. Could you please answer if I'm missing something?
Hi professor how to get effective in physics
Practice
Can't see your writing st all
pls where do you get this questions from. I love them and I am studying for A level physics. pls recommend a good textbook with good questions like this