Kinetic Energy Problem

A 3 kg ball is rolling 2 m/s. How much kinetic energy does it have?

What is 3 kg?
1. m (mass)
2. a (acceleration)
3. d (distance)
4. v (velocity)
5. F (force)
6. t (time)
A 3 kg ball is rolling 2 m/s. How much kinetic energy does it have?

m = 3 kg
What is 2 m/s?
1. m (mass)
2. a (acceleration)
3. d (distance)
4. v (velocity)
5. F (force)
6. t (time)
A 3 kg ball is rolling 2 m/s. How much kinetic energy does it have?

m = 3 kg
v = 2 m/s

What are you looking for (what is your unknown)?
1. m
2. v
3. d
4. t
5. KE
6. GPE
7. W
8. P
A 3 kg ball is rolling 2 m/s. How much kinetic energy does it have?

m = 3 kg
v = 2 m/s
KE = ? (your unknown)

Which equation will you use?
1. Ek = (1/2)mv²
2. GPE = mgh
3. D = m/v
4. p = mv
5. F = ma
6. S = D/t
A 3 kg ball is rolling 2 m/s. How much kinetic energy does it have?

m = 3 kg
v = 2 m/s
Equation: Ek = (1/2)mv²

What does v² mean?
1. v x v
2. 2 x v
3. v x 2
4. v + 2
A 3 kg ball is rolling 2 m/s. How much kinetic energy does it have?

m = 3 kg
v = 2 m/s
Equation: Ek = (1/2)mv²

Which of the following is correct?
1. Ek = (1/2) x (3 kg) x (2 m/s)²
2. Ek = (1/2) x (2 m/s) x (3 kg)²
3. Ek = (1/2) x (3 kg) x (2 m/s)
4. Ek = 2 x (3 kg) x (2 m/s)
A 3 kg ball is rolling 2 m/s. How much kinetic energy does it have?

m = 3 kg
v = 2 m/s
Equation: Ek = (1/2)mv²
Ek = (1/2) x (3 kg) x (2 m/s)²

What does (2 m/s)² equal?
1. 4
2. 2
3. 1
4. 8
A 3 kg ball is rolling 2 m/s. How much kinetic energy does it have?

m = 3 kg
v = 2 m/s
Equation: Ek = (1/2)mv²
Ek = (1/2) x (3 kg) x (2 m/s)²
Ek = (1/2) x (3 kg) x (4 m²/s²)

So, Ek = ___ (without units)
1. 6
2. 8
3. 4
4. 9
5. 10
A 3 kg ball is rolling 2 m/s. How much kinetic energy does it have?

m = 3 kg
v = 2 m/s
Equation: Ek = (1/2)mv²
Ek = (1/2) x (3 kg) x (2 m/s)²
Ek = (1/2) x (3 kg) x (4 m²/s²)
Ek = 6 __

What are the units for Ek (abbreviated)?
1. J
2. N
3. m
4. w
5. m/s
6. sec