Answer:
Acceleration 
Explanation:
We have given that the force by the motor 
Resistive force by the water 
So net force 
Mass of the boat = 1384.1 kg
According to newton's second law F=Ma, here M is mass and a is acceleration
So 

Answer:
Mass, m = 816.33kg
Explanation:
Weight can be defined as the force acting on a body or an object as a result of gravity.
Mathematically,
Where;
- m is the mass of an object.
- g is acceleration due to gravity.
Making mass, m the subject of formula, we have;
Given the following data;
Weight = 8000N
We know acceleration due to gravity is equal to 9.8 m/s²
Substituting into the equation, we have;
Mass, m = 816.33kg
Therefore, the mass of the elevator is 816.33kg.
Answer:
Explanation:
Conservation of momentum during the collision
0.480(45) + 0.240(0) = (0.480 + 0.240)v
v = 30 m/s
An impulse results in a change of momentum
FΔt = mΔv
F = 0.240(30 - 0) / 0.015 = 480 N
or
F = 0.480(45 - 30) / 0.015 = 480 N