Conduction, Convection, and in some cases, Radiation.
Answer:
Explanation:
Depression = .75 x 10⁻² m
Load = 120 g
Spring constant = 120g / .75 x 10⁻²
= 160 x 10² g / m
b )
Depression by player
= .48 x 10⁻² m
His weight
= .48 x 10⁻² x 160 x 10² g
= 76.8 kg
So he is eligible.
Answer:
-10837 J
Explanation:
The law of conservation of momentum states that the initial total momentum is equal to the final total momentum, so:
where
m = 22.3 g = 0.0223 kg is the mass of the bullet
is the initial velocity of the bullet
M = 1 kg is the mass of the block
is the initial velocity of the block
is the final velocity of the bullet
is the final velocity of the block
Solving for we find
The total kinetic energy before the collision is:
And the total kinetic energy after the collision is:
So, the change in kinetic energy is
Answer:
Explanation:
The impact between bat and ball is an extremely violent one, in which the bat imparts a huge force on the ball thereby causing it to change directions and gain speed. Consider a baseball weighing 5.125oz (mass = 0.145kg) which approaches the bat at a speed of 90mph (40.2m/s). After the collision with the bat, with a contact time of 0.7milliseconds (0.0007s)[1,2] the bat has a speed of 110mph (49.1m/s) in the opposite direction.