An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the force of the bug on the car is _____________.
same
The second hand on a watch has a length of 4.50 mm. What is the speed of the end of the second hand as it moves in uniform circular motion?
4.71x10^-4 m/s
Object A is twice the mass of object B. Both objects are dropped off a cliff and fall under the sole influence of earth’s gravity near its surface. The acceleration of object A is ___________ the acceleration of object B
equal
What is the stopping distance of a car with initial speed 10.0 m/s that decelerates uniformly at a rate of 2.0 m/s^2 ?
25 m
A horse pulls a cart along a flat road. Consider the following four forces that arise in this situation. (1) the force of the horse pulling on the cart (2) the force of the cart pulling on the horse (3) the force of the horse pushing on the road (4) the force of the road pushing on the horse Which two forces form an "action-reaction" pair that obeys Newton's third law?
3 and 4
A racecar is traveling at constant speed around a circular track. If the speed is doubled, the centripetal acceleration is A)No Change B) 2x. C)4x . D)1/2. E)1/4
C
Which of the following statement(s) applies to the motion of a ball rising and then falling in free fall? I. The ball has constant acceleration as it moves upward. II. The ball has constant acceleration at the top of its path. III. The ball has constant acceleration as it moves downward.
d) I, II, and III
A 30 kg box is pulled across the floor with a force of 49 N applied at 27degrees above the horizontal. A 25. N friction force impedes the motion of the box.What will be the acceleration of the box?
0.62 m/s^2
A 5kg ball is swung in a horizontal circle of radius 2m. The ball goes around the circle every 1.5 seconds, what is the centripetal force?
263 N
In which of the following situations would an object be accelerated? I. It moves in a straight line at constant speed. II. It moves in a circle at constant speed. III. It travels as a projectile in a gravitational field with negligible air resistance.
D
A 16.0 N force is applied at 24.0 degrees above the horizontal to a 1.5 kg brick to drag it across a table. The coefficient of sliding (kinetic) friction is 0.43. What is the acceleration of the brick?
7.4 m/s^2
A car of mass 800 kg moves on a flat circular track of radius 40 m. If the coefficient of friction is 0.5, then maximum velocity with which the car can move is ____________
14 m/s
As the angle at which a turn is banked increases, this force takes on an increasing role in the centripetal force
Normal Force
Calculate the resultant velocity of 10 m/s, 30 degrees North of East and 10 m/s, 60 degrees West of South.
0
An object with a mass of 7.2 kg is allowed to slide from rest down an inclined plane. The plane makes an angle of 30 degrees with the horizontal and is 65 m long. The coefficient of friction between the plane and the object is 0.45. What is the velocity of the object at the bottom of the plane?
12m/s
What is the minimum velocity for a car to barely make it around a 15m loop?
12.12 m/s