Answer:
7. Net constant force down the ramp
Explanation:
After the car is released and starts moving up the ramp, the only force that is applied on the car is weight because of the gravity, we were told that the friction force is neglected. the force because of the weight is given by:

where θ is the angle of the ramp.
as you can see those values won't change, so the force remains constant down the ramp.
Answer:
1. A burning streak of light, called a Meteor.
2.The rocky bodies that survives the fall to the planet’s surface are Meteorites.
Explanation:
Let us see the difference between them.
- Asteroids: They are the remnants of a broken planet orbiting the sun in between Mars and Saturn. They are small rocky bodies from a tennis ball size to larger ones weighing a few tones.
- Meteoroids: They are the small rocky objects of pebble size formed due to the collision of asteroids.
-
Meteors: These are pebble size objects that enter Earth's atmosphere and burns off by forming streaks of light.
- Meteorites: These are rocky objects bigger than meteors than don't burn out completely and fall on the earth's surface.
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Comets: These are objects mainly made of dust and ice that orbit the sun in a highly elliptical orbit. This composition makes a long tail when approaching the sun.
Weather is the condition of the atmosphere at a particular place and time
Climate is the average condition of the atmosphere of a specific place over a long period of time
Explanation:
It is given that,
An electron is located on a pinpoint having a diameter of 3.52 µm, 
We need to find the minimum uncertainty in the speed of the electron. It can be calculated using Heisenberg uncertainty principal as :


Since, p = m v
So, 



So, the minimum uncertainty in the speed of the electron is greater than 16.57 m/s. Hence, this is the required solution.
Answer:
h = 5.05 m
Explanation:
given,
mass of pole vaulter, m = 64 Kg
speed of the vaulter,V = 10.2 m/s
horizontal component of velocity in air, v = 1 m/s
height of the jump,h = ?
using energy conservation


initial height of the vaulter is equal to zero.



h = 5.05 m
height of the jump is equal to 5.05 m.