a 10K buggy is moving at 2.5 m/s. calculate the energy
To calculate the energy, we need to know the mass of the buggy. Without that information, we cannot determine the energy accurately.
a 10K buggy is moving at 2.5 m/s. calculate the energy. Kg is the mass
To calculate the energy of the buggy, we need to know its mass in kilograms (kg). Assuming the mass of the buggy is 10 kg, we can use the kinetic energy formula:
Kinetic energy (KE) = 1/2 * mass * velocity^2
Plugging in the values:
KE = 1/2 * 10 kg * (2.5 m/s)^2
KE = 1/2 * 10 kg * 6.25 m^2/s^2
KE = 31.25 Joules
Therefore, the energy of the 10 kg buggy moving at 2.5 m/s would be 31.25 Joules.
A 3 kg rock is sitting at the top of a hill that is 21 m high. Calculate the energy of the rock. Kg is the mass
To calculate the energy of the rock, we need to consider both its potential energy and kinetic energy.
Potential energy (PE) = mass * gravitational acceleration * height
PE = 3 kg * 9.8 m/s^2 * 21 m
PE = 617.4 Joules
Therefore, the potential energy of the 3 kg rock at the top of the hill is 617.4 Joules. Note that this calculation assumes negligible air resistance and other non-conservative forces acting on the rock.
A cart has 30 j of potential energy at the top of a 20 m hill. Assuming no energy is transformed to another form of energy, how much kinetic energy does the cart have when its halfway down the hill?
To determine the kinetic energy of the cart when it is halfway down the hill, we can use the principle of conservation of energy. According to this principle, the total mechanical energy of the cart remains constant throughout its motion without any external work or non-conservative forces acting.
The total mechanical energy (E) is the sum of potential energy (PE) and kinetic energy (KE):
E = PE + KE
Given that the cart has 30 J of potential energy at the top of the hill, we can set up the equation:
30 J = PE + KE
Since the cart is halfway down the hill, its potential energy would be half of the total potential energy at the top. So, the potential energy at this halfway point would be 30 J / 2 = 15 J:
15 J = PE + KE
Substituting the potential energy (PE) into the equation, we have:
15 J = 15 J + KE
Simplifying the equation, we find that the kinetic energy (KE) would be:
KE = 15 J - 15 J = 0 J
Therefore, when the cart is halfway down the 20 m hill, assuming no energy is transformed to another form of energy, it has 0 J of kinetic energy.