Posted by **ashley** on Thursday, September 15, 2011 at 10:48pm.

A hockey player is standing on his skates on a frozen pond when an opposing player, moving with a uniform speed of 12 m/s, skates by with the puck. After 2.0 s, the first player makes up his mind to chase his opponent. If he accelerates uniformly at 4.0 m/s2, determine each of the following.

(a) How long does it take him to catch his opponent?(b) How far has he traveled in that time?

- physics -
**Henry**, Saturday, September 17, 2011 at 8:10pm
a. d1 = Vo*t + at^2,

d2 = 12(t+2),

d1 = d2,

0 + 0.5*4t^2 = 12(t+2),

2t^2 = 12t + 24,

2t^2 - 12t - 24 = 0,

Divide both sides by 2:

t^2 - 6t - 12 = 0.

Use Quadratic Formula to find t:

t = 7.58s.

b. d = 0 + 0.5*4*(7.58)^2 = 114.9s.

## Answer this Question

## Related Questions

- Physics - Can someone please show me how to do this? A hockey player is standing...
- Physics - A hockey player is standing on his skates on a frozen pond when an ...
- Physics - A hockey player's arm and stick form a 1.6 m rigid segment. If the ...
- physics - a person stands in the center of a frozen pond wearing ice skates. his...
- physics - a person stands in the center of a frozen pond wearing ice skates. his...
- physics - a hockey player pushes a puck across the ice with his stick. assuming ...
- Physics - A hockey player shoots the puck which is initially at rest by applying...
- physics - A 45 kg boy is holding a 12 kg pumpkin while standing on ice skates on...
- physycs - A hockey player skates down the ice at an angle of 34° to a line ...
- physic - A hockey player strikes a puck that is initially at rest. The force ...

More Related Questions