Answer:
1. 2.5s
Explanation:
1. For time, divide Distance / speed
25m / 10
=2.5s
Answer:
The mass of the beam is = 29 kg.
Explanation:
A beam with mass 40 kg is shown in figure. Point S is the support point. Point B is the middle point on the beam where mass of the beam acts.
Taking moment about Point S
40 × 21 = 
× 29
= 29 kg
Therefore the mass of the beam is = 29 kg.
Answer:
the SI unit of momentum is :- kg.ms-1
and we know that,
kinetic energy = 1/2 mv2
E=p2/2m
p=(2Em)1/2
so the derived units are (J.kg)1/2
Explanation:
Answer:
a) F = μk mg Cosθ
b) F = 279.78 N
Explanation:
a) F = μk R
Based on the description in the question, the horizontal reaction is:
R = mg Cosθ
The force required to move the box with constant speed in terms of m, μk, θ, and g is :
F = μk mg Cosθ
b) If m = 90 kg
g = 9.8 m/s²
μk=0.35
θ = 25⁰
Force required to slide the 90-kg patient across a floor at constant speed by pulling on him at an angle of 25∘ above the horizontal will be:
F = μk mg Cosθ
F = 0.35 * 90 * 9.8 * cos25
F = 279.78 N
