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A driver in a car traveling at a speed of 68 km/h sees a cat 109 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 106 m?
You are driving to the grocery store at 19 m/s .You are 140 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.80 s. and that your car brakes with constant
You are driving to the grocery store at 20 {rm m}/{rm s}. You are 150 {rm m} from an intersection when the traffic light turns red. Assume that your reaction time is 0.79 {rm s} and that your car br
Tarzan does not know that the vine has a breaking strength of 1.0 x 10^3 N. What is the largest mass Tarzan can have and make it safetly across the river?
Precisely 2.00 s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.10 m/s^2, how much time passes before the police car overtakes the speed
A cannon at the top of a 176 m high cliff fires at a pirate ship. The cannonball has an initial velocity of 149 m/s at 68° above horizontal. Ignore air resistance. At what angle (positive angle
A horse canters away from its trainer in a straight line, moving 110 m away in 19.0 s. It then turns abruptly and gallops halfway back in 4.2 s. Calculate its average velocity for the entire trip, u
A lead ball is dropped into a lake from a diving board 6.50 above the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the wat
A car traveling at 120 km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.80 m. What was the average acceleration of the driver during the collis
A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 41.0, and the distance betwee
What is the magnitude of the y-component of the electron's velocity when it leaves the plates? (Answer in units of ANSWER x 107 m/s.)
A heavy ball with a weight of 100N is hung from the ceiling of a lecture hall on a 4.0 m--long rope. The ball is pulled to one side and released to swing as a pendulum, reaching a speed of 5.6m/s a
How does the magnitude of the force exerted by the airplane seat on the pilot at the bottom of the arc compare to her weight? (What is the ratio of magnitude of the force exerted by the seat to the
A rifle with a barrel length of 61 cm fires a 10 g bullet with a horizontal speed of 440 m/s . The bullet strikes a block of wood and penetrates to a depth of 15 cm .What resistive force (assumed t
The first person is initially moving forward with a speed of 2.00 m/s, and the second person is initially at rest. What are the velocities of the two people after the snowball is exchanged? Disregar
High-speed stroboscopic photographs show that the head of a 190 g golf club is traveling at 59 m/s just before it strikes a 46 g golf ball at rest on a tee. After the collision, the club head travel
In a cyclotron (one type of particle accelerator), a deuteron (of mass 2.00 u) reaches a final speed of 12.0% of the speed of light while moving in a circular path of radius 0.477 m. What magnitude
What is the magnitude of the apparent weight of a 66 kg astronaut 5200 km from the center of the Earth's Moon in a space vehicle moving at constant velocity?
What is the minimum coefficient of friction between tires and road that will allow cars to take the turn without sliding off the road? (Assume the cars do not have negative lift.)
An airplane has a wing area (each wing) of 10 m^2. At a certain airspeed, air flows over the upper wing surface at 48 m/s and over the lower wing surface at 40 m/s. What is the mass of the plane? (T
A(n) 4.23 kg sphere makes a perfectly in-elastic collision with a second sphere that is initially at rest. The composite system moves with a speed equal to one-third the original speed of the 4.23 k
An average friction force of 4.0 x 10^3 N impedes the car's motion so that the car's speed at the bottom of the driveway is 3.8 m/s. What is the length of the driveway?
A Federation starship (2.0 x 106 kg) uses its tractor beam to pull a shuttlecraft (2.0 x 104 kg) aboard from a distance of 10 km away. The tractor beam exerts a constant force of 4.0 x 104 N on the
An object is placed on a horizontal surface which oscillates vertically with simple harmonic motion. When the frequency is increased to 7HZ, the object is on the point of losing contact with the sur
A proton (mass= 1.7×10-27 kg, charge= 1.6×10-19 C) travelling with speed 106 m/s enters a region of space containing a uniform magnetic field of 1.2 T. What is the time t required for th