Forces
A ball was spinning around on a string of a certain radius at a constant speed. Then it went around the same curve at half of the original speed. Which of the following correctly identifies the new force acting on the ball?
The new force exerted on the car towards the center of the curve was one-half as much as before.
What is an object's change in momentum equal to?
linear impuls
what is energy formula?
E=mc2
an athlete leaves the base the base camp and hike 10km,north and then hikes 5km east. determine his resulting displacement.
5km se
A ball was spinning around on a string of a certain radius at a constant speed. Then it went around the same curve at half of the original speed. Which of the following correctly identifies the new force acting on the ball?
The new force exerted on the car towards the center of the curve was one-half as much as before
A 5000kg truck and a 1000kg car are travelling at constant speeds and then collides. What is true about the Forces and acceleration on each?
Both Forces and acceleration are different.
Object A, with a mass of 5kg, is moving at a velocity of 3 m/s while Object B, with a mass of 3 kg is moving at a velocity of -5 m/s. Based on the calculations of their momentum, which of the following statements is correct?
Red ball since force and acceleration are directly related.
(Z) If an object has a constant velocity, what can be said about its acceleration?
zero
What are the 3 main concepts of projectile motion?
Range, Symmetry, Maximum Height.
what is net force formula
F=ma
Kids were playing with balls which are of equal mass. They kicked them with different forces. Which one accelerated more?
Red ball since force and acceleration are directly related.
An object has a mass of 100 kg moving at 5 m/s. What is the linear momentum of the object?
500kgm/s
(Z) Which of the following represents a negative displacement?
at rest
for a projectile, which velocity remains constant as long as air as air resistance is ignored?
constant velocity in horizontal direction.
what is net forces?
A man is whirling a 0.5 kg ball on a 1.0 m long string at 2 m/s. What is true about the force on the ball?
There is no force on the ball
If a ball is thrown up in the air what is the momentum?
zero
A child riding a merry-go-round feels a centripetal force. How would the magnitude of the acceleration change if the velocity doubled (2x)?
double (2x)
what is the vertical acceleration of a projectile in projectile motion? is it equal to the acceleration due to gravity?
what is the net force of the ball if it was thrown on the ground?
it would be the force of gravity because it weight acting downwards.
If the car of 75kg is traveling around a curve of radius of 50m at a velocity of 15 m/s, what is the centripetal force of the car?
337N
When a truck is moving north word having mass 2000kg at a constant speed of 50m/s the momentum of the truck is 100000 kg.m/s.
100000kg
A football was kicked toward the goal. The horizontal component of velocity was 10 m/s and the vertical component was 7 m/s . What is the magnitude of the resultant velocity of the soccer ball?
10m/s
What is the formula for downward projectile motion?
h = v 0 y 2 2 g
How do you calculate net force?
FNet=Fa+Fg