Physics Force & Laws Of Motion Level: High School
If the speed of a car is doubled , the impulse required to stop the car changes by a factor of ?
Physics Force & Laws Of Motion Level: High School
Conservation of Momentum
A gun is made of a super low weight but strong material . The bullet for the gun is more massive than the gun itself . For such a gun
Physics Force & Laws Of Motion Level: High School
A car traveling at 100 km/hr strikes an unfortunate bug and splatters it . The force of impact is ?Physics Force & Laws Of Motion Level: High School
A tennis ball bounces off a brick wall . Which of the following is true ? Impulse acts on the ball and impulse = mu-(-mu) . if it becomes off with the same speed .Physics Force & Laws Of Motion Level: High School
A baseball player bats a ball with a force of 1000 N . The bat has a mass of .5 kg . The ball exerts a reaction force against the bat of ?Physics Force & Laws Of Motion Level: High School
If a person wanted to drag a 40 kg table across a floor the feet having a coefficient friction of 0.7 , how much force does the person need to exert to coefficient friction of 0.7 , how much force does the person need to exert to start the table sliding and why is the table easier to drag if the person lifts the end of the table slightly so that two legs are off the floor ?
Physics Force & Laws Of Motion Level: High School
Impulse
A 200 g ball hits a wall perpendicular with a velocity of 30 m/s and rebounds with a velocity of 20 m/s . If the collision lasts for 5 milliseconds , find the average force exerted by the ball on the wall .a) 1000 N
b) 4000 N
c) 6000 N
d) 2000 N
Physics Force & Laws Of Motion Level: High School
A car is traveling downhill with a constant velocity . Which of the following statement is true ?a) There is a net vertical force acting on the car
b) There is a net force on the car in the uphill direction
c) There is a net force acting on the car in the downhill direction
d) There is no net force acting on the car .
Physics Force & Laws Of Motion Level: High School
A safe with a mass of 150 kg is at rest on the floor , what is the minimum horizontal force needed to move the safe if the coefficient of static friction between the safe and the floor is 0.3 ? (assume g = 9.8 m/s^2)a) 441 N
b) 501 N
c) 51 N
d) 41 N
Physics Force & Laws Of Motion Level: High School
The Vector Nature of Newton’s Second Law of Motion
Airplane flight recorders must be able to survive catastrophic crashes . Therefore , they are typically encased in crash-resistant steel or titanium boxes that are subjected to rigorous testing . One of the tests is an impact shock test , in which the box must survive being thrown at high speeds against a barrier . A 41 kg box is thrown at a speed of 245 m/s and is brought to a halt in a collision that lasts for a time of 5.2 ms . What is the magnitude of the average net force that acts on the box during collision ?
Physics Force & Laws Of Motion Level: High School
The Vector Nature of Newton’s Second Law of Motion
A 410 kg sailboat has an acceleration of 0.43 m/s^2 at an angle of 31 degree north of east . Find the magnitude and direction of the net force that acts on the sailboat ?
Physics Force & Laws Of Motion Level: High School
The Vector Nature of Newton’s Second Law of Motion
Two forces , F1 and F2, act on the 5.00 kg block shown in the figure at ‘click here’ . The magnitude of the force are F1 = 50.0 N and F2 = 31.0 N . What is the horizontal acceleration (magnitude and direction ) of the block ?
Physics Force & Laws Of Motion Level: High School
The Vector Nature of Newton’s Second Law of Motion
A force vector has a magnitude 630 N and a direction of 45 degree north of east . Determine the magnitude and direction of the components of the force that point along the north-south line and along the east-west line .
Physics Force & Laws Of Motion Level: High School
Newton’s First Law of Motion
A 1720 kg car is traveling with a speed of 15.0 m/s . What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 56.0 m ?
Physics Force & Laws Of Motion Level: High School
Newton’s First Law of Motion
Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit . In one test , this gun accelerates a 5.0 kg projectile from rest to a speed of 4.5 x 10^3 m/s . The net force accelerating the projectile is 5.5 x 10^5 N . How much time is required for the projectile to come up to speed ?