Answer:
0.81 m/s^2
Explanation:
A child rides a bicycle from rest
The child reaches a velocity of 3.8m/s
The time is 4.7 secs
Therefore the acceleration can be calculated as follows
v= u + at
3.8= 0 + a(4.7)
3.8= 0 + 4.7a
3.8-0= 4.7a
3.8= 4.7a
a= 3.8/4.7
= 0.81 m/s^2
Hence the acceleration is 0.81 m/s^2
Answer:
a) heavier on sun
b) 63.0 kN
Explanation:
The weight is directly related to gravity, so because the sun has a bigger gravity than earth the barbell will be heavier on the sun.
the force exerted by the gravity is defined as:
One characteristic of a sample of matter that indicates it is a pure
substance is the homogeneity of the molecular structure. If the structure is
the same all throughout such as liquid water, it is said to be homogenous.
Answer:
10km/s²
Explanation:
Given parameters:
Initial velocity = 0km/s
Final velocity = 70km/s
Time = 7s
Unknown:
Acceleration =?
Solution:
Acceleration is the rate of change of velocity with time.
It is mathematically expressed as;
A =
v is the final velocity
u is the initial velocity
t is the time
A = = 10km/s²