Given
Force=200N
Mass=5.5kg
F=ma
a=F/m=200/5.5=38.18metre per second
Answer:
The term that refers the rate change of motion is acceleration.
Explanation:
The rate at which the motion changes is called as the acceleration. It is a vector quantity with the SI unit meters. There is device to measure the acceleration called as accelerometer. The acceleration is also affected by the increase and the decrease of the force and mass. It is directly proportional to it. The acceleration increases with force, but found to be decreasing with mass. It can be calculated by taking the product of displacement by time.
<h3><u>Answer;</u></h3>
a) 178.6125 Joules
b) Work done does not depend on constant speed or acceleration up the ladder
<h3><u>Explanation</u>;</h3>
Work done =Fd times the cosine of angle between;
where F is force d is distance m is the mass a is acceleration
.F=ma. In this case a=g=9.81 m/s^2 and cos 30=0.866
Therefore;
W= 75 × 9.81 × 2.75 × .866
= 178.6125 Joules
b. The work done by the painter does not depend on whether the painter climbs at constant speed or accelerates up the ladder.
W=3376.945 Joules
The gravitational force between two objects may be calculated by the equation,
F = G x (m1 x m2) / d²
where G is universal gravitational constant, m1 and m2 are the masses of two bodies and d is the distance between them. Substituting the known values,
9.20 x 10^-9 = (6.673 x 10^-11) (5.01 kg x m2) / (0.192m)²
The value of m2 is approximately 1.01 kg.
Resistance = voltage / current
Resistance = 63 / 4
Resistance = 15.75 ohms
