Fast Food Physics Practice Test

FAST FOOD PHYSICS

PRACTICE TEST

Question 1: A 0.25 kg burger is dropped from a 2 m high counter. Neglecting air

resistance, what is its velocity just before hitting the ground? (Use g = 9.8 m/s²)

Choices:

1) 4.43 m/s 2) 6.26 m/s 3) 19.6 m/s 4) 39.2 m/s

Correct Answer: 6.26 m/s

Explanation: Using v² = u² + 2gs: v² = 0 + 2(9.8) = 39.2, so v = sqrt(39.2) ≈ 6.26 m/s.Page 1

Question 2: A drive-thru worker slides a 0.5 kg tray of food across a counter. The initial velocity is 3 m/s and it stops after 1.5 meters. What is the coe�cient of kinetic friction? (g = 9.8 m/s²)

Choices:

1) 0.15

2) 0.31

3) 0.45

4) 0.61

Correct Answer: 0.31

Explanation: Work-energy: 0.5*m*v² = F_f * d = mu*m*g*d. 0.5*² = mu*(9.8)*(1.5). 4.5 = 14.7*mu, mu ≈ 0.31.Question 3: A French fry is thrown horizontally o� a 1.2 m high table at 4 m/s. How far horizontally does it land from the edge of the table?

Choices:

1) 1.98 m 2) 2.40 m 3) 3.10 m 4) 4.80 m

Correct Answer: 1.98 m

Explanation: Time to fall: t = sqrt(2h/g) = sqrt(2..8) ≈ 0.495 s. Horizontal distance = v*t = 4 * 0.495 = 1.98 m.Page 2

Question 4: A pizza delivery car accelerates uniformly from rest to 20 m/s in 8

seconds. What is its acceleration?

Choices:

1) 1.5 m/s² 2) 2.0 m/s² 3) 2.5 m/s² 4) 3.0 m/s²

Correct Answer: 2.5 m/s²

Explanation: a = (v - u) / t = (20 - 0) / 8 = 2.5 m/s².

Question 5: A 60 kg fast-food mascot is bouncing on a pogo stick. If the spring

constant is 5000 N/m, how much does the spring compress when the mascot stands still on it?

Choices:

1) 0.08 m 2) 0.12 m 3) 0.15 m 4) 0.20 m

Correct Answer: 0.12 m

Explanation: F = kx. mg = kx. 60*9.8 = 5000*x. 588 = 5000x. x = 0.1176 m, approx 0.12 m.Page 3