Exam 4: Motion With Constant Acceleration

You are standing on a bathroom scale in an elevator that is not moving and it reads 500 N.The elevator then moves downward at a constant velocity of 4.50 m/s.What does the scale read?

A 92.5 kg stunt man stands on a piston that will launch him out of a vertical tube.The piston applies a constant force F to the man's feet.Starting from rest,the force is applied as the man moves vertically 3.25 m,and while the piston is pushing,the man attains a velocity of 25.5 m/s.What was the man's apparent weight during this time interval?

A rocket is launched from the origin with an acceleration of 20.0 m/s² at an angle of 30.0 degrees above the horizontal.The launch acceleration lasts for 2.00 seconds at which time the fuel is exhausted.The rocket then falls with an acceleration of 9.80 m/s² downward.What is the time it takes to reach maximum height?

A projectile is projected from the origin with a velocity of 30.0 m/s at an angle of 45.0 degrees above the horizontal.What is the range of the projectile?

A sprinter runs 100.0 m.If he travels at constant acceleration of 1.95 m/s² for the first 75.0 m and then at constant velocity for the remaining distance,what was his total elapsed time for the whole race?

A baseball is struck by a batter at an angle such that it reaches its maximum height at the location of the pitcher – and just grazes the top of the pitcher’s head (at an elevation of 1.50 m above the launch point of the baseball). The pitcher is a horizontal distance of 20.0 m from the point at which the ball was struck. What was the launch speed for the baseball?

A projectile is projected from the origin with a velocity of 20.0 m/s at an angle of 30.0 degrees above the horizontal.The projectile lands on a roof that is 4.00 m height.What is the speed when the projectile hits the roof?

A ball is thrown straight up with an initial speed of 30 m/s.What is its speed after 4.2 s?

A ball is thrown upward at a velocity of 19.6 m/s.What is its velocity after 3.00 s?

A model rocket flies upward at constant acceleration,and undergoes a displacement of 15.0 m during its first 0.25 s of travel.What was its speed at the end of the first 0.25 s?

A 92.5 kg stunt man stands on a piston that will launch him out of a vertical tube.The piston applies a constant force F to the man's feet.Starting from rest,the force is applied for 1.20 s,and during that time interval,the man attains a velocity of 25.5 m/s.What was the man's apparent weight during this time interval?

Ball A is dropped from the top of a building.One second later ball B is dropped from the same point.As time progresses,the distance between them

A projectile is projected from the origin with a velocity of 20.0 m/s at an angle of 60.0 degrees above the horizontal.What is the maximum height of the projectile?

A ball thrown into the air follows a parabolic trajectory.At the highest point in the trajectory

A rocket is launched from the origin with an acceleration of 20.0 m/s² at an angle of 30.0 degrees above the horizontal.The launch acceleration lasts for 2.00 seconds at which time the fuel is exhausted.The rocket then falls with an acceleration of 9.80 m/s² downward.What is the total time of flight?

Two masses are connected by a string which passes over pulley with negligible mass and friction.One mass hangs vertically and one mass slides on a 30.0 degrees frictionless incline.The vertically hanging mass is 4.00 kg and the mass on the incline is 6.00 kg.The acceleration of the 4.00 kg mass is

A ball is thrown straight up,reaches a maximum height,then falls to its initial height.As the ball is going up

A bullet shot straight up returns to its starting point in 10 s.What is the initial speed of the bullet?

An airplane flying horizontally at a speed of 50.0 m/s and an elevation of 160 m drops a package.Two seconds later it drops a second package.How far apart will the two packages land?

A projectile is projected from the origin with a velocity of 15.0 m/s at an angle of 30.0 degrees above the horizontal.What is the location of the projectile 2.00 seconds later?