Answer:
20 m/s
Explanation:
Height (s)= 20m
acceleration (a) = 10 m/s^2
v=?
we know,
V^2= U^2 + 2as. (U is initial velocity)
or,. V^2 = 0 + 2 × 10 × 20
or, V^2 = 400
or,. V = 20 m/s
Answer:5.35N
Explanation:
Force is defined as the product of mass of an object and its acceleration.
Acceleration is the change in velocity of an object with respect to time.
Acceleration = velocity/ time = 6.5/0.17 = 38.2m/s²
since F = ma and mass is 140g
140g to kg will be 140/1000 = 0.14kg
F = 0.14× 38.2
F = 5.35N
magnitude of the average force is 5.35N
1). an electric motor running
Electrical energy is changing into kinetic energy and a little bit of heat
2). light a match
The chemical energy stored in the match head changes into light and heat energy.
3). a light bulb
Electrical energy is changed into light and heat energy.
A controlled experiment is when scientests go throw thests to make an experiment
Answer:
The bicycle slows down because of the frictional force acting on the tyres of the bicycle. When this frictional force overcomes the force applied by paddling, the bicycle stops.
