Answer:
Explanation:
Reaction force of inclined surface
R = mgcos30
=60 x 9.8 x .866
= 509 N
Force of kinetic friction
= .12 x 509
= 61.08 N
b )
net force downwards = mgsinθ - μmgcosθ
acceleration = g sinθ - μgcosθ
9.8 sin30 - .12 x 9.8 x cos30
= 4.9 - 1.018
a= 3.88 m /s²
c )
v² = 2as
= 2 x 3.88 x 20
v = 12.46 m /s
<span>The rate at which work is done or energy is used is referred to as power. </span>
Answer:
NO
Explanation:
Acceleration is change in velocityΔv in respect to timeΔt
so if the velocity of the car is greater than the truck it does not mean that the car acceleration is greater than the truck.
Sometimes with constant velocity it means no accelaration ,but the truck may have accelaration
so, higher velocity of the car does not mean higher acceleration
m = mass of the cat being lifted = 5 kg
h = height to which the cat is raised into air = 2 m
g = acceleration due to gravity of earth = 9.8 m/s²
U = gravitational potential energy gained by the cat
Gravitational potential energy gained by the cat is given as
U = m g h
inserting the values in the above equation
U = (5 kg) (9.8 m/s²) (2 m)
U = (5 x 9.8 x 2) (kg m²/s²)
U = 98 J
