Answer: total mechanical energy of -4.6 x 10^10 j.
Explanation: the planet express is in a circular orbit around the earth and has a total mechanical energy of -4.6 x 10^10 j.
The total mechanical energy is the sum of potential energy and the kinetic energy.
For the rocket to experience the escape from earth, the total work done will be equal to maximum kinetic energy.
According to conservative of energy, maximum kinetic energy is equal to the total mechanical energy.
The work must be provided by the planet expresss rockets in order to completley escape earth will be equal to total mechanical energy of -4.6 x 10^10 j.
How did the angel of the pendulum affect the period
Answer:The starting angle of a pendulum does not affect its period for .
Explanation: however, the period increases with increasing . The starting angle of a pendulum does not affect its period for.
A projectile is fired vertically upwards and reaches a height of 78.4 m. Find the velocity of projection and the time it takes to reach its highest point.
Answer:
1.) U = 39.2 m/s
2.) t = 4 seconds
Explanation: Given that the
height H = 78.4m
The projectile is fired vertically upwards under the acceleration due to gravity g = 9.8 m/s^2
Let's assume that the maximum height = 78.4m. And at maximum height, final velocity V = 0
Velocity of projections can be achieved by using the formula
V^2 = U^2 - 2gH
g will be negative as the object is moving against the gravity
0 = U^2 - 2 × 9.8 × 78.4
U^2 = 1536.64
U = sqrt( 1536.64 )
U = 39.2 m/s
The time it takes to reach its highest point can be calculated by using the formula;
V = U - gt
Where V = 0
Substitute U and t into the formula
0 = 39.2 - 9.8 × t
9.8t = 39.2
t = 39.2/9.8
t = 4 seconds.
What is the weight, on Earth, of a book with a mass of 1.5 kg?
0 15 N
6.5 N
11.3.N
147 N
[tex]solution \\ mass = 1.5 \: kg \\weight = m \times \: g \\ \: \: \: \: \: \: \: \: \: \: \: \: = 1.5 \times 9.8 \\ \: \: \: \: \: \: \: \: \: = 14.7 \: newton[/tex]
hope this helps...
Good luck on your assignment...
Given:
Mass,m = 1.5 kgAcceleration due to gravity,g = 9.8 m/s² [ constant ]To find out:
Find the weight?
Formula used:
Weight = m × g
Solution:
Weight of book = m × g
★ Putting the values in the above formula,we get:
Weight of book = 1.5 × 9.8
= 15/10 × 98/10
= 1,470/100
= 14.7 kg.m/s²
May I please get some help?
A unicorn running on a beach at 8 m/s changes speed at a constant rate of 2.7
m/s2 over a period of 2 seconds. What is the unicorn's velocity at the end of this
time?
Answer:
13.4 m/s
Explanation:
Write down what you have, so:
V0=8 m/s
a=2.7 m/s^2
t=2 seconds
We are trying to find final velocity, so we will use vf = v0 + at
From there, we plug in the given values.
vf = 8 m/s + (2.7 m/s^2 x 2 seconds)
vf = 13.4 m/s
Answer:
about 13s
Explanation: