Posted by Kevin on Saturday, February 6, 2010 at 4:45pm.
A 90 kg halfback runs north and is tackled by a 120 kg opponent running south at 4 m/s. The collision is perfectly inelastic. Just after the tackle, both players move at a velocity of 2 m/s north. Calculate the velocity of the 90 kg player just before the tackle.
a.) 3 m/s south
b.) 4 m/s south
c.) 10 m/s north
d.) 12 m/s north
- Physics - Priscilla, Saturday, February 6, 2010 at 5:24pm
mA = 90 kg
MAf = 2 m/s
mB = 120 kg
MAi = 4 m/s
MAf = 2 m/s
Use the equation:::
(MA)(VAf) + (MB) (VBf) = (MA)(VAi) + (MB)(MBi)
If you have any questions, just reply back.
- Physics - Damon, Saturday, February 6, 2010 at 5:25pm
90 v - 120 * 4
(90+120) * 2
set those equal and solve for v
Answer This Question
More Related Questions
- Physics - A 79.0-kg fullback running east with a speed of 4.00 m/s is tackled by...
- PHYSICS HELP! - An 88.5 kg fullback moving east with a speed of 5.5 m/s is ...
- physics - 001 (part 1 of 2) 10.0 points An 86 kg fullback moving east with a ...
- Physics URGENT!!! - A 75.0 kg fullback running east with a speed of 6.00 m/s is ...
- physics - A 89.0 kg fullback running east with a speed of 5.00 m/s is tackled by...
- physics - An 87.0 kg fullback moving east with a speed of 5.0 m/s is tackled by ...
- physics - On a very muddy football field, a 110 linebacker tackles an 75 ...
- physic - A 0.500 kg sphere moving with a velocity (2.00 - 3.10 + 1.00) m/s ...
- physics - A 120-kg tackler moving at 5 m/s meets head-on (and tackles) a 80-kg ...
- General Physics - A 0.500 kg sphere moving with a velocity (2.00i - 3.50j + 1....