Exam 4: Motion With Constant Acceleration

Two masses are connected by a string which passes over a pulley with negligible mass and friction.One mass hangs vertically and one mass slides on a 30.0 degrees incline.The inclined surface has a coefficient of kinetic friction of 0.200.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 (the initial velocity of the 6.00 kg mass is up the incline)

Two masses are connected by a string which passes over a pulley with negligible mass and friction.One mass hangs vertically and one mass slides on a frictionless horizontal surface.The horizontal surface has a coefficient of kinetic friction of 0.2.The vertically hanging mass is 4.00 kg and the mass on the horizontal surface is 6.00 kg.The acceleration of the 4.00 kg mass is

A rock is thrown straight up and reaches a maximum height.Which of the following describes the motion at the maximum height?

A blue ball is dropped from the roof of a tall building simultaneously with the horizontal launch of a red ball.Which statement is true?

A projectile is projected from the origin with a velocity of 10.0 m/s at an angle of 30.0 degrees above the horizontal.What is the velocity of the projectile 2.00 seconds later?

A 35.0 kg girl swings on a swingset.At the bottom of the swing's path,she feels as though she weighs 435 N.What is the value of the tension in the swing's ropes at the bottom of the swing's path?

Human reaction time is usually greater than 0.10 s.If your friend holds a ruler between your fingers and releases it without warning,how far can you expect the ruler to fall before you catch it?

The figure shows the graph of v_x versus time for an object moving along the x-axis.Solve graphically for the average acceleration between t = 5.0 s and t = 9.0 s.

A ball is thrown straight up with a speed of 30.0 m/s.What is the maximum height reached by the ball?

Two masses are being pulled up a 30.0 degrees incline by a force F parallel to the incline.The acceleration down the incline is 1.00 m/s² and the velocity is up the incline.The force is applied to a 200 kg mass and a string connects the 200 kg mass to a 150 kg mass.The coefficient of kinetic friction is 0.200.The tension in the string is

A projectile is projected from the origin with a velocity of 30.0 m/s at an angle of 40.0 degrees above the horizontal.What is the position vector when the projectile is at the maximum height?

A sprinter runs 100.0 m in 9.87 seconds.If he travels at constant acceleration for the first 75.0 m and then at constant velocity for the final 25.0 m,what was his peak velocity?

Two masses are being pulled up a 30.0 degrees incline by a force F parallel to the incline.The acceleration up the incline is 1.00 m/s² and the velocity is up the incline.The force is applied to a 200 kg mass and a string connects the 200 kg mass to a 150 kg mass.The coefficient of kinetic friction is 0.200.The tension in the string is

A projectile is projected from the origin with a velocity of 45.0 m/s at an angle of 30.0 degrees above the horizontal.What is the time it takes for the projectile to hit the ground?

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 velocity vector when the projectile hits the roof?

A small golden statue falls from a height of 8.2 m above the top surface of a pillow.If the acceleration of the statue upon striking the pillow is constant,what is the value of the acceleration if the pillow compresses by 3.9 cm as the statue comes to rest?

A mouse is running away from a cat at 0.75 m/s and,at 1.25 m from his mouse hole,he accelerates at a constant rate of 0.25 m/s² until he reaches his hole safely.How long a time was required for him to cover the last 1.25 m?

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 4.0 m height.What is the distance along the horizontal axis when the projectile hits the roof?

Two masses are being pulled up a 30.0 degrees incline by a force F parallel to the incline.The acceleration down the incline is 1.00 m/s² and the velocity is up the incline.The force is applied to a 200 kg mass and a string connects the 200 kg mass to a 150 kg mass.There is no friction.The tension in the string is

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 X distance (range)when the rocket hits the ground?