# Physics

A hockey player is standing on his skates on a frozen pond when an opposing player, moving with a uniform speed of 14 m/s, skates by with the puck. After 3.5 s, the first player makes up his mind to chase his opponent.
(a) If he accelerates uniformly at 4.0 m/s2, how long does it take him to catch his opponent? (Assume the player with the puck remains in motion at constant speed.)
s
(b) How far has he traveled in this time?
m

1. 👍 1
2. 👎 0
3. 👁 314
1. d1 = V1*t = 14m/s * 3.5s. = 49 m. Head-start.

a. d2 = 49 + V1*t.
0.5a*t^2 = 49 + V1*t.
0.5*4*t^2 = 49 + 14*t.
2t^2-14t-49 = 0.
t = 9.56 s.

b. d = 0.5a*t^2.

1. 👍 0
2. 👎 1
2. For this question t^2+ (what s)t+ what s^2=0
Help!!!!!!!

1. 👍 1
2. 👎 0

## Similar Questions

1. ### AP physics

A 0.278-kg volleyball approaches a player horizontally with a speed of 16.2 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.4 m/s. (a) What impulse is

2. ### physics

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

3. ### physics

a football player runs at 8 m/s and plows into a 80 kg referee standing on the field causing the referee to fly forward at 5 m/s. if this were a perfectly elastic collision, what would the mass of the football player be?

4. ### Physics

A 96.3-kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is μk = 0.619. (a) What is the magnitude of the frictional force? (b) If the player comes to rest after 1.00

1. ### physics

A 0.280-kg volleyball approaches a player horizontally with a speed of 15.0 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.0 m/s. a)what impulse is delivered

2. ### physics

A 75 kg hockey player glides across the ice on his skates with steel blades. What is the magnitude of the force of friction acting on the skater?

3. ### Physics

A basketball player, standing near the basket to grab a rebound, jumps 73.6 cm vertically. How much time does the player spend in the bottom 15.4 cm of the jump? Ok...after this I swear I'm done! I just need someone to check my

4. ### physics

A 98.0 kg ice hockey player hits a 0.150 kg puck, giving the puck a velocity of 49.5 m/s. If both are initially at rest and if the ice is frictionless, how far does the player recoil in the time it takes the puck to reach the goal

1. ### Physics

A volleyball player serves a ball, giving it an initial velocity of 8.5 m/s [32 up] at an initial height of 1.4 m above the court floor. An opposing player jumps to meet the ball and hits 2.36 m above the court, returning it

2. ### Physics

A baseball player uses a pitching machine to help him improve his batting average. He places the 43.4 kg machine on a frozen pond. The machine ﬁres a 0.0546 kg baseball horizontally at a speed of 44.8 m/s. What is the magnitude

3. ### Physics

An 81 kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is .49. a) what is the magnitude of the frictional force? b) If the player comes to a rest after 1/6s, what

4. ### physical science

Suppose you are playing ice hockey in the middle of a totally frictionless frozen pond. How can you move yourself to the edge of the pond? Explain what you would do and why it would work.