WorksheetsNewton's First and Second Laws of Motion
Total questions: 11
Worksheet time: 11mins
A cart is acted on by a 5-N force forward, a 7-N force backward, and another 2-N force forward. Which statement is true about the motion of the cart?
The cart must remain at rest.
The cart must remain in motion in a straight line at a constant, non-zero speed.
The cart must be keeping its velocity constant, even if its velocity is zero.
The cart must have a velocity that is changing.
No statement can be made about what the motion of the cart must be.
A cart is remaining at rest, and is acting under the action of a person pushing forward with 6.5 N of force, a friction force of 2.5 N pushing backward, and a third unknown force. The unknown force must be ___.
6.5 N forward
4.0 N backward
4.0 N forward
9.0 N forward
9.0 N backward
Newton's First Law of Motion says that an object that is acting under the influence of forces that are balanced ___.
must be moving with a constant velocity in a straight line
must be changing its velocity
must be at rest
is keeping its velocity constant, even if the velocity is zero
might have any type of motion
A cart is acted on by a 14-N force forward, a 6-N force backward, and another 6-N force backward. Which statement is true about the motion of the cart?
The cart must remain at rest.
The cart must remain in motion in a straight line at a constant, non-zero speed.
The cart must be keeping its velocity constant, even if its velocity is zero.
The cart must have a velocity that is changing.
No statement can be made about what the motion of the cart must be.
Camille launches has a catapult that changes the velocity of a ball (m= 2 kg) from 0 to 10 m/s in one sec. What is the average force that is exerted on the ball during launch?
20 N
5 N
8 N
0.2 N
If a 6.0-kg object is accelerating forward at 1.5 m/s², the net force on the object must be ___.
7.5 N
9.0 N
4.0 N
4.5 N
9.0 m/s²
A cart is moving forward at 5.0 m/s, and is acting under the action of a person pushing forward with 3.0 N of force, a friction force of 4.5 N pushing backward, and a third unknown force. The unknown force must be ___.
1.5 N forward
1.5 N backward
7.5 N forward
7.5 N backward
3.0 N forward
If forces on an object are balanced, what is the net force equal to?
Zero
The force of gravity
The support force opposing gravity
There is not enough information to determine the net force.
A 5.0-kg box is under the influence of a 24.0-N force forward and a 9.0-N force backward. The acceleration of the box will be ___.
15 m/s² forward
3.0 m/s² backward
3.0 m/s² forward
15.0 m/s² forward
3.0 N forward
