Moon orbits around the Earth in a circular path. Does it accelerate? why?
What is Yes. It changes direction continuously
100
What kind of friction is air resistance
What is Fluid friction
100
What is "Resistance to motion"
What is Inertia
100
What does F = ma stand for?
What is Force = mass x acceleration
200
A car was driven at an average speed of 50 Km/h. The driver driver drove for 3 hours before taking a 1 hour lunch brake. She then drove for another 2 hours and stopped for gas and coffee which took 1 hour. Finally she drove 3 hours and reached her destination. Find the total distance she drove.
What is 500 Km
200
a rock falls from a certain height and hits ground with a velocity of 30 m/s. How long did it take to hit the ground?
g = 10 m/s/s
What is 3 seconds
200
What two things friction depends on?
What is Type of surfaces and how hard they push on each other.
200
If the gravity of sun suddenly disappeared, in which direction the planets will move?
What is They will go in a straight in the direction they were moving when gravity of Sun disappeared.
200
If you strike two objects ( a 50 Kg ball and a 10 Kg ball) with the same force, which one will accelerate more?
What is the 10 Kg ball
300
An airplane travels 400 Km toward North in 2 hours. What is its velocity
What is 200 Km/h North
300
John trots his pony in an oval track at a constant speed. What can you say about the pony's motion
What is the pony accelerates as it is changing direction.
300
What kind of friction acts on objects just before they start moving?
What is static friction
300
What happens to the motion of an object if balanced forces act on it?
What is The motion does not change.
300
Sally's car has a mass of 1000 Kg and accelerates at 5 m/s/s. How much force does it produce?
What is 5000 N
400
What is the difference between speed and velocity
What is velocity is speed in a direction
400
an object, moving at a velocity of 20 m/s comes to halt in 5 seconds. find its acceleration.
What is -4 m/s/s
400
A car comes to halt without applying brakes. What causes it to stop
What is friction
400
suppose you place a ball in the middle of a wagon, and then accelerate the wagon forward. describe the motion of the ball 1. relative to the ground 2. relative to the wagon
What is the ball moves forward relative to the ground and backwards relative to the wagon
400
two persons standing on scooter boards push each other. What will happen in light of Newton's 3rd law of motion/
What is they both will be pushed backwards
500
A driver drives 140 Km in 3 hours, takes a lunch break for 1 hour, drives 90 Km in 3 hours, stops for gas and coffee for 1 hr, and finally drives 120 Km in 2 hours. Find his average speed.
What is 35 Km/h
500
an object falls under gravity from rest. What is its velocity at the end of 5 seconds from start?
What is 50 m/s
500
An object is moving at a constant speed under a force of 100 N. What is the force of friction acting on the object?
What is 100N
500
Why is it easier to stop a store cart as compared to a car?
What is The store cart has less mass and therefore smaller inertia
500
Your weight on earth is 1000N but on Planet X it is 600N. What is the value of g for planet X?