Physics Kinematics Level: High School
A 2000 kg car is slowed down uniformly from 20.0 m/s to 5.00 m/s in 4.00 sa) What average force acted on the car during that time ?
b) How far did the car travel during that time ?
Physics Kinematics Level: High School
A freight train has a mass of 1.5 x 10 to the seventh power kg . If the locomotive can exert a constant pull of 7.5 x 10 to the fifth power N , how long does it take to increase the speed of the train from rest to 80 km/h ?
Physics Kinematics Level: High School
Projectile motion
A small sphere of mass M = 0.875 kg is launched with an initial speed of v = 15.00 at an angle , with respect to the horizontal , of x = 25.00 degrees . The sphere is launched off a cliff a distance h = 30.00 m above ground level . Finda) The maximum height above the ground attained by the sphere .
b) The speed of the sphere as it strikes the ground
c) The speed of the sphere the “top” of its path .
Physics Kinematics Level: High School
One dimensional
You stands at the top of a cliff while your friend stands on the ground below you . You drop a ball from rest and see that it takes 1.2 s for the ball to hit the ground below . Your friend then picks up the ball and throws it up to you . such that it just comes to rest in your hand . What is the speed w/which your friends threw the ball ?
Physics Kinematics Level: High School
Equation of Motion
A person jumps from a 4th story window 15 m above a firefighter’s safety net . The survivor stretches the net 1.0 m before coming to rest .a) What was the average deceleration experienced by the survivor when she was slowed to rest by the net ?
b) What would you do to make it “safer” (that is to generate a smaller deceleration ) would you stiffen or loosen the net ? explain .
Physics Kinematics Level: High School
At the left the in the figure (at “click here”) we see a sandbag being dropped from a balloon . At the moment the sandbag is dropped , the balloon is moving upwards at 10 m/s . Why would some people believe that the motion is as depicted in the centre and others believe that the motion is as depicted at the right .Give as many reasons as possible fro each viewpoint) . Which picture is correct from an experiment point of view ?
Physics Kinematics Level: High School
A barge with a mass 150 MG is proceeding down river at 6.20 m/s in heavy fog when it collides broadside with a barge heading directly across the river . The second barge has mass 278 MG and was initially moving at 4.30 m/s . Immediately after the impact , the second barge find its course deflected by 18 degrees in the down river direction and speed increases to 5.10 m/s . At the site of collision the river had broadened sufficiently that its current was negligible compared with the barge speeds .
Physics Kinematics Level: High School
Projectile motion
A 2.05m tall basketball player takes a shot when he is 6.02 m from the basket (at the three-point line) . If the launch angle is 25 degree and the ball was launched at the level of the player’s head . What must be the release speed of the ball for the player to make the shot ? The basket is 3.05 m above the floor .
Physics Kinematics Level: High School
Projectile motion
A ditch 2.5 m wide crosses a trail bike path . An upward incline of 15o has been built up on the approach so that the top of the incline is level with the top of the ditch . what is the minimum speed a trial bike must be moving to clear the ditch ? (Add 1.4 m to the range for the back of the bike to clear the ditch safely )
Physics Kinematics Level: High School
Resultant velocity
A boat that travels at the speed of 6.75 m/s in still water is to go directly across a river and back . The current flows at 0.50 m/sa) At what angle must the boat be steered ?
b) How long does it take to make the round trip ?
(Assume that the boats speed is constant at all times , and neglect turnaround time . )
Physics Kinematics Level: High School
Relative velocity
While you are traveling in a car on a straight, level inter-state highway at 90 km/h, another car passes you in the same direction ; its speed meter reads 120 km/h .a) What is your velocity relative to the other driver ?
b) What is the other car’s velocity relative to you ?
Physics Kinematics Level: High School
Two dimensional motion
A roller coaster at an amusement park starts out on a level track 50.0 m long and then goes up a 25.0 m incline at an angle of 30 degree to the horizontal . It then goes down a 15.0 m ramp with an incline of 40 degrees to the horizontal . When the roller coaster has reached the bottom of the ramp , what is its displacement from the starting point ?
Physics Kinematics Level: High School
Two dimensional motion
A particle moves as at speed of 2.5 m/s in the +x direction . Upon reaching the origin . the particle receives a continuous constant acceleration of 0.75 m/s^2 in the –y direction . What is the position of the particle 4.0 s later ?
Physics Kinematics Level: High School
A car traveling at 20 m/s is brought to a halt by applying the brakes in 4s , what is the magnitude of acceleration of the car ?a) 4 m/s^2
b) 3 m/s^2
c) 5 m/s^2
d) 2 m/s^2
Physics Kinematics Level: High School
Projectile motion
Suppose you were on top of a cliff of height h , and threw a ball horizontally with speed v , How far would it go before it hits the ground ? (Ignore air resistance) (ie, what is the formula that describes range in terms of horizontal speed and height ?)