Answer:
Momentum = 7.14 Kgm/s
Explanation:
Given the following data;
Mass = 0.170 kg
Velocity = 42m/s
To find the momentum;
Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.
Mathematically, momentum is given by the formula;
Momentum = mass * velocity
Substituting into the equation, we have;
Momentum = 0.170 * 42
Momentum = 7.14kgm/s
Therefore, the momentum of the honey puck is 7.14 Kgm/s.
The answer is A. Only an object in motion has kinetic energy.
Answer:
a) 
b) 
Explanation:
Given:
- efficiency of the motor,
- voltage of the battery,
- mass of the car,
a)
initial velocity, 
final velocity, 
time taken for the acceleration, 
Now we know by the Newton's second law of motion:
Now the power will be :
<u>According to the question:</u>
0.95 times of the electrical power should yield this mechanical power.
b)
height climbed by the car, 
velocity of climb,
time taken to climb the height, 
force exerted to overcome air and frictional resistances, 
Now the Power required to climb the hill:
<u>Now according to the electrical efficiency:</u>
A car speeding down a 20 foot hill
Answer:
12.245m3
Explanation:
The electric energy is created by The potential energy substended by the specific volume of water in dam.
Electric energy is calculated as
E= Q× V
E is Energy, Q is charge and V is Voltage
Note that this energy has been given and is 60Joules
From conservation of energy it means;
M× g×h = 60
Where M is the mass of water.
g is acceleration of free fall due to gravity which is 9.8m/S2
h is the height of water flow.
From change of subject of formula for M; we have:
M = 60/ g × h
= 60/ 9.8 × 0.5
= 12.245kg
Now how much water required means the volume of water;
Note density = mass/volume
Therefore volume = mass/density
=12.245/1= 12.245m3
Note the density of water is 1kg/m3
