Recent content by Rapta3

In a certain library the first shelf is 12.0 cm off the ground, the remaining 4 shelves are each spaced 33.0 cm above the previous one. If the average book has a mass of 1.90 kg with a height of 22.0 cm, and average shelf holds 29 books (standing vertically), how much work is required to fill...

Anyone??

A golf ball of mass 0.045 kg is hit off the tee at a speed of 42 m/s. The golf club was in contact with the ball for 4.7 10-3 s. (a) Find the magnitude of the impulse imparted to the golf ball. N · s (b) Find the magnitude of the average force exerted on the ball by the golf club. N

A tennis ball may leave the racket of a top player on the serve with a speed of 62.0 m/s. If the ball's mass is 0.0600 kg and it is in contact with the racket for 0.0200 s, what is the average force on the ball? Would this force be large enough to lift a 60 kg person? large enough or not...

A tennis ball may leave the racket of a top player on the serve with a speed of 62.0 m/s. If the ball's mass is 0.0600 kg and it is in contact with the racket for 0.0200 s, what is the average force on the ball? Would this force be large enough to lift a 60 kg person? large enough or not...

Yea converting the g to kg was the missing step, thanks.

K got it, ty, got another one for you tho. This one is HARD. A 13 g bullet traveling 218 m/s penetrates a 2.0 kg block of wood and emerges going 161 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?

How do you slove for Mb from this equation (MaVa+MbVb)/Ma+Mb=Vab

Ok well thanks for everything... time for some sleep, ill talk to guys later, bye.

If the coefficient of kinetic friction between a 39 kg crate and the floor is 0.25, what horizontal force is required to move the crate at a steady speed across the floor? If it is what you say it is, it should be .25, but its not so what else is missing?

Ok thank you.

Ok someone help me with my second question, please

thats what i said, look above i got 73.2

No that's the complete question...

Ok help me out then here, i know F=MA but for the first question i posted, i did that and the answer got was wrong so I don't know how to get the right answer...