Module 5: Work and Energy

Attribution: openstax, College Physics 2e, access for free

Table 1

variable	quantity	value	SI unit
\( m\)	mass	\( 0.145\)	\( kg \)
\( v \)	velocity	\(34.3 \)	\( m/s \)
\( KE=\frac{1}{2}mv^2 \)	kinetic energy	?	\( joules \; (J) \)

Table 2

variable	quantity	value	SI unit
\( m \)	mass	\( 0.145 \)	\( kg \)
\( y \)	height from y=0	\( 60.0 \)	\( m \)
\( PE=mgy \)	gravitational potential energy	\( ? \)	\( joules \; (J) \)

Table 3

variable	quantity	value
\( E_{1} = \frac{1}{2}mv_{1}^{2} + mgy_{1} \)	initial Mechanical Energy	\( 0 + mgy \)
\( E_{2} = \frac{1}{2}mv_{2}^{2} + mgy_{2} \)	final Mechanical Energy	\( \frac{1}{2}mv^{2} + 0 \)
\( E_{1} =E_{2} \)	Conservation of Mechanical Energy	\( \frac{1}{2}mv^{2} = mgy \)

Table 4

variable	quantity	value	SI unit
\( F_{\text{on Ball}} \)	Force on Ball by Glove	?	\( N \)
\( d \)	the distance required to completely stop the ball	\( 0.17 \)	\( m \)
\( v_{1} \)	initial speed of the ball	\( 34.29 \)	\( m/s \)
\( v_{2} \)	final speed of the ball	\( 0 \)	\( m/s \)
\( m\)	mass of the ball	\( 0.145 \)	\( kg \)

Table 5

variable	quantity	value	SI unit
\( \Delta PE = mgh \)	change in potential energy	\( 2352 \)	\( joules (J)\)
\( W = \Delta PE \)	work done to increase potential energy	\( 2352 \)	\( J \)
\( P=\dfrac{W}{t} \)	average power is rate of doing work	\( ? \)	\( watts (W) \)

my ID