The potential energy of a pear is 5.0 joules. The pear is 4 m high. What is the mass of the apple?
1 answer:
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<h3><u>Question</u><u>:</u></h3>
A racing car is travelling at 70 m/s and accelerates at -14 m/s^2. What would the car’s speed be after 3 s?
<h3><u>Statement:</u></h3>A racing car is travelling at 70 m/s and accelerates at -14 m/s^2.
<h3><u>Solution</u><u>:</u></h3>- Initial velocity (u) = 70 m/s
- Acceleration (a) = -14 m/s^2
- Time (t) = 3 s
- Let the velocity of the car after 3 s be v m/s
- By using the formula,
v = u + at, we have
- So, the velocity of the car after 3 s is 28 m/s.
The car's speed after 3 s is 28 m/s.
Hope it helps
Answer:
The value of the acceleration of gravity of the Unknown Planet = 1.14
Explanation:
length of the pendulum (L)= 1.15 m
Time period (T)= 6.29 seconds
We know that time period of a simple pendulum is given by
⇒ T = 2 ×
put the values in the above formula we get
⇒ T = 2 ×
⇒ 6.29 = 2 ×
By solving the above equation we get
⇒ g = 1.14
This is the value of the acceleration of gravity of the Unknown Planet.