Show:
Kinematics
Free Fall and Projectile Motion
Newton's Laws of Motion
Circular motion and ULG
Conceptual Questions
100
A car travels 90. meters due north in 15 seconds. Then the car turns around and travels 40. meters due south in 5.0 seconds. What is speed of the car during this 20.-second interval?
6.5 m/s
100
A ball thrown vertically upward reaches a maximum height of 30. meters above the surface of Earth. At its maximum height, the speed of the ball is
0
100
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
100

An astronaut orbits the earth in a space capsule whose height above the earth is equal to the earth's radius. How does the weight of the astronaut in the capsule compare to her weight on the earth? 

A)It is equal to her weight on earth. 

B)It is equal to one-half of her weight on earth. 

C)It is equal to one-third of her weight on earth. 

D)It is one-fourth her weight on earth. 

E)It is equal to one-sixteenth her weight on earth.

D

100

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. Compare the acceleration of A to the acceleration of B.

A. Acceleration of A is four times that of B.

B. Acceleration of A is twice that of B.

C. Acceleration of A is half that of B.

D. Acceleration of A is equal to that of B.

D. Acceleration of A is equal to that of B.

200

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/s2 ?

25 m

200
A basketball player jumped straight up to grab a rebound. If she was in the air for 0.80 second, how high did she jump?
0.784 m
200
A 1.5-kilogram lab cart is accelerated uniformly from rest to a speed of 2.0 meters per second in 0.50 second. What is the force producing this acceleration?
6 N
200
An astronaut weighs 800 newtons on the Surface of Earth. What is the weight of the astronaut 6.378 × 10^6 meters above the surface of Earth?
200 N
200

Which of the following statements 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. 


a) I only 

b) III only 

c) I and III 

d) I, II, and III

d) I, II, and III

300
A car initially traveling at a speed of 16 meters per second accelerates uniformly to a speed of 20. meters per second over a distance of 36 meters. What is the car’s acceleration?
2 m/s^2
300
A ball is dropped from a 70 m tall tower. How long will it take the ball to hit the ground?
3.78 s
300
A 10 kg mass sitting on a frictionless table is connected by means of a string and pulley to a 5 kg mass hanging over the edge of the table. What is the acceleration of the mass ?
3.27 m/s^2
300

A ball of mass M at the end of a string is swung in a horizontal circular path of radius R at constant speed V. Which combination of changes would require the greatest increase in the centripetal force acting on the ball?

(1) doubling V and doubling R

(2) doubling V and halving R

(3) halving V and doubling R

(4) halving V and halving R

(2) doubling V and halving R

300

In which of the following situations would an object be accelerated? 

I. It moves in a straight line at constant speed. 

II. It moves with uniform circular motion. 

III. It travels as a projectile in a gravitational field with negligible air resistance. 


(A) I only 

(B) III only 

(C) I and II only 

(D) II and III only 

(E) I, II, and III

D

400
An object starts from rest and accelerates uniformly in a straight line . After 11 seconds, its speed is 70.0 m/s. How far does the object travel during the first 11 seconds?
385 m
400
A tennis ball is thrown from ground level with velocity v directed 20° above the horizontal. If it takes the ball 2.5 s to reach the top of its trajectory, what is the initial velocity?
14 m/s
400
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
400

On the surface of Earth, a spacecraft has a mass of 2.00 × 104 kilograms. What is the mass of the spacecraft at a distance of one Earth radius above Earth’s surface?

2.00 × 104 kilograms

400

For which one of the following situations will the path length equal the magnitude of the displacement? 

A)A jogger is running around a circular path. 

B)A ball is rolling down an inclined plane. 

C)A train travels 5 miles east; and then, it stops and travels 2 miles west. 

D)A ball rises and falls after being thrown straight up from the earth's surface. 

E)A ball on the end of a string is moving in a vertical circle.

B

500

Two identical bowling balls A and B are each dropped from rest from the top of a tall tower. Ball A is dropped 1.0 s before ball B is dropped, but both balls fall for some time before ball A strikes the ground. After ball B is dropped, but before ball A strikes the ground, which of the following is true? 

(A) The distance between the two balls decreases. 

(B) The velocity of ball A increases with respect to ball B. 

(C) The velocity of ball A decreases with respect to ball B. 

(D) The distance between the two balls remains constant. 

(E) The distance between the two balls increases

E

500
A football is kicked with a speed of 22 m/s at an angle of 60.0° with the horizontal. What is the velocity at the highest point?
11 m/s
500
A 10-N net force is applied for 6.0 s to a 5-kg box initially at rest. What is the speed of the box at the end of the 6.0-s interval?
12m/s
500
A 5.00 kg object completes 10.0 revolutions in 3.0 seconds with a radius of 30.0 cm. What is the acceleration of the object?
131.6 m/s^2
500
Calculate the resultant of 10 m/s, 30 degrees North of East and 10 m/s, 60 degrees West of South.
0