A car moves at 20 meters in 2 seconds. What is the momentum of the car if it has a mass of 3,000 kg?
A football player runs across the field for a tackle. He has a momentum of 1,120 kg x m/s and is moving down the field at 10 m/s what is the mass of the player?
Anything helps I've looked for help and tried doing these I just don't get it!
momentum=mass*velocity=2000*2/20 kgm/s
b. momentum=mass*velocity
mass=momentum/velocity
car: velocity = 20/2 m/s = 10 m/s
momentum = mass * velocity = 3000*10 kg x m/s
player: mass = momentum/velocity = 1120/10 = 112 kg.
To calculate momentum, you need to use the equation:
Momentum (p) = mass (m) × velocity (v)
For the first question, you are given the velocity (20 m) and the mass (3,000 kg). Plugging these values into the equation, you get:
Momentum = 3,000 kg × 20 m/s = 60,000 kg·m/s
Therefore, the momentum of the car is 60,000 kg·m/s.
For the second question, you are given the momentum (1,120 kg·m/s) and the velocity (10 m/s). We need to find the mass (m) using the same equation:
Momentum = mass × velocity
Substituting the given values, we get:
1,120 kg·m/s = mass × 10 m/s
To isolate the mass, divide both sides of the equation by 10 m/s:
mass = 1,120 kg·m/s ÷ 10 m/s = 112 kg
Therefore, the mass of the football player is 112 kg.
Remember, the formula for momentum is p = m × v, where p is the momentum, m is the mass, and v is the velocity. By plugging in the given values and solving for the missing variable, you can find the answer.